C++ 程序设计（谭浩强）教材例题程序

C++程序设计题解与上机指导

教材例题程序

第一章
Ch1-1
#include <iostream>
using namespace std;
int main()
{
 cout<<"This is a C++ program.";
 return 0;
}

Ch1-2
#include <iostream>
using namespace std;
int main()
{
 int a,b, sum;
 cin>>a>>b;
 sum=a+b;
 cout<<"a+b="<<sum<<endl;
 return 0;
}

Ch1-3-1
#include <iostream>
using namespace std;
int max(int x,int y)
{ int z;
  if(x>y) z=x;
  else z=y;
  return(z);
}

int main()
{ int a,b,m;
  cin>>a>>b;
  m=max(a,b);
  cout<<"max="<<m<<endl;
  return 0;
}

Ch1-3-2
#include <iostream>
using namespace std;
int main()
{ int max(int x,int y);
  int a,b,c;
  cin>>a>>b;
  c=max(a,b);
  cout<<"max="<<c<<endl;
  return 0;
}

int max(int x,int y)
{
  int z;
  if(x>y) z=x;
  else z=y;
  return(z);
}

Ch1-4
#include <iostream>
using namespace std;
class Student
{
 private:
  int num;
  int score;
 public:
  void setdata()
  {
   cin>>num;
   cin>>score;
  }
  void display()
  {
   cout<<"num="<<num<<endl;
   cout<<"score="<<score<<endl;
  };
};
Student stud1,stud2;

int main()
{
  stud1.setdata();
  stud2.setdata();
  stud1.display();
  stud2.display();
  return 0;
 }

第二章

Ch2-1
#include <iostream>
using namespace std;
int main ( )
   {int i,j;
     i='A';
	 j='B';
	 cout<<i<<' '<<j<<'\n';
	 return 0;
}  

Ch2-2
#include <iostream>
using namespace std;
int main()
{char c1,c2;
 c1='a';
 c2='b';
 c1=c1-32;
 c2=c2-32;
 cout<<c1<<' '<<c2<<endl;
 return 0;
}

Ch2-3
#include <iostream>
#define PRICE 30
using namespace std;
int main ( )
{int num,total;
 num=10;
 total=num * PRICE;
 cout<<"total="<<total<<endl;
 return 0;
}

Ch2-4
#include <iostream>
using namespace std;
int main()
{ float x;
  int i;
  x=3.6;
  i=(int)x;
  cout<<"x="<<x<<",i="<<i<<endl;
  return 0;
}

Ch2-5
#include <iostream>
using namespace std;
int main()
{ unsigned short a;
  short int b=-1;
  a=b;
  cout<<"a="<<a<<endl;
  return 0;
}

第三章

Ch3-1
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{ 
 double a=123.456,b=3.14159,c=-3214.67; 
 cout<<setiosflags(ios::fixed)<<setiosflags(ios::right)<<setprecision(2);
 cout<<setw(10)<<a<<endl;
 cout<<setw(10)<<b<<endl;
 cout<<setw(10)<<c<<endl; 
 return 0;
}

Ch3-2
#include <iostream>
using namespace std;
int main()
{char a,b,c;
 a='B';b='O';c='y';
 putchar(a);putchar(b);putchar(c);putchar(10);
 putchar(66);putchar(79);putchar(89);putchar(10);
 return 0;
}

Ch3-3
#include <iostream>
using namespace std;
int main()
{char c;
 c=getchar();
 putchar(c+32);
 putchar('\n');
 return 0;
}

Ch3-3-2
#include <iostream>
using namespace std;
int main()
{putchar(getchar()+32);putchar('\n');
 return 0;
}

Ch3-4
#include <iostream>
using namespace std;
int main()
{int a;
 float b;
 char c;
 scanf("%d %c %f",&a,&c,&b);
 printf("a=%d,b=%f,c=%c\n",a,b,c);
 return 0;
}

Ch3-5
#include <iostream>
#include <cmath>
using namespace std;
int main()
{float  a,b,c,x1,x2;
 cin>>a>>b>>c;
 x1=(-b+sqrt(b*b-4*a*c))/(2*a);
 x2=(-b-sqrt(b*b-4*a*c))/(2*a);
 cout<<"x1="<<x1<<endl;
 cout<<"x2="<<x2<<endl;
 return 0;
}

Ch3-6
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
 double a,b,c;
 cout<<"please enter a,b,c:";
 cin>>a>>b>>c;
 if (a+b>c && b+c>a && c+a>b)
  {
   double s,area;
   s=(a+b+c)/2;
   area=sqrt(s*(s-a)*(s-b)*(s-c));
   cout<<setiosflags(ios::fixed)<<setprecision(4);
   cout<<"area="<<area<<endl;
  }
 else cout<<"it is not a trilateral!"<<endl;
 return 0;
}

Ch3-7
#include <iostream>
using namespace std;
int main()
{
  char ch;
  cin>>ch;
  ch=(ch>='A' && ch<='Z')?(ch+32):ch;
  cout<<ch<<endl;
  return 0;
}

Ch3-8
#include <iostream>
using namespace std;
int main()
{
  int year;
  bool leap;
  cout<<"please enter year:";
  cin>>year;
  if (year%4==0)
    {if(year%100==0)
      {if (year%400==0)
          leap=true;
       else leap=false;}
     else
		 leap=true;}
  else
      leap=false;
  if (leap)
     cout<<year<<" is ";
  else
     cout<<year<<" is not ";
     cout<<" a leap year."<<endl;
  return 0;
}

Ch3-9
#include <iostream>
using namespace std;
int main()
{int c,s;
 float p,w,d,f;
 cout<<"please enter p,w,s:";
 cin>>p>>w>>s;
 if(s>=3000) c=12;
 else c=s/250;
 switch (c)
 { case 0:d=0;break;
   case 1:d=2;break;
   case 2:
   case 3:d=5;break;
   case 4:
   case 5:
   case 6:
   case 7:d=8;break;
   case 8:
   case 9:
   case 10:
   case 11:d=10;break;
   case 12:d=15;break;
 }
  f=p*w*s*(1-d/100.0);
  cout<<"freight="<<f<<endl;
  return 0;
}

Ch3-10
#include <iostream>
using namespace std;
int main()
{
 int i=1,sum=0;
 while (i<=100)
  {sum=sum+i;
   i++;
  }
 cout<<"sum="<<sum<<endl;
 return 0;
}

Ch3-11
#include <iostream>
using namespace std;
int main()
{int i=1,sum=0;
 do 
  { sum=sum+i;
    i++;
   }while (i<=100);
 cout<<"sum="<<sum<<endl;
 return 0;
}

Ch3-12
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{int s=1;
 double n=1,t=1,pi=0;
 while((fabs(t)) > 1e-7)
   {pi=pi+t;
    n=n+2;
    s=-s;
    t=s/n;
	}
 pi=pi*4;
 cout<<"pi="<<setiosflags(ios::fixed)<<setprecision(6)<<pi<<endl;
 return 0;
}

Ch3-13
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{long f1,f2;
 int i;
 f1=f2=1;
 for(i=1;i<=20;i++)
   {cout<<setw(12)<<f1<<setw(12)<<f2;
    if(i%2==0) cout<<endl;
    f1=f1+f2;
    f2=f2+f1;
   }
  return 0;
 }

Ch3-14
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{int m,k,i,n=0;
 bool prime;
 for(m=101;m<=200;m=m+2)
   {prime=true;
	k=int(sqrt(m));
    for(i=2;i<=k;i++)
		if(m%i==0) {prime=false;break;}
    if (prime)
      {cout<<setw(5)<<m;
       n=n+1;
      }
    if(n%10==0) cout<<endl;
   }
 cout<<endl;
 return 0;
}

Ch3-15
#include <iostream>
using namespace std;
int main()
{char c;
 while ((c=getchar())!='\n')
   {if((c>='a' && c<='z') || (c>='A' && c<='Z'))
      {c=c+4;
       if(c>'Z' && c<='Z'+4 || c>'z') c=c-26;
      }
    cout<<c;
   }
 cout<<endl;
 return 0;
}

第四章

Ch4-1
#include <iostream>
using namespace std;
void printstar(void)
{
 cout<<"******************************"<<endl;
}

void print_message(void)
{
 cout<<"      Welcome  to  C++!"<<endl;
}

int main(void)
{
 printstar();
 print_message();
 printstar();
 return 0;
}

Ch4-2
#include <iostream>
using namespace std;
int max(int x,int y)
{int z;
 z=x>y?x:y;
 return(z);
}

int main()
{int a,b,c;
 cout<<"please enter two integer numbers:"; 
 cin>>a>>b;
 c=max(a,b);
 cout<<"max="<<c<<endl;
 return 0;
}

Ch4-3
#include <iostream>
using namespace std;
int main()
{float add(float,float);
 float a,b,c;
 cout<<"please enter a,b:";
 cin>>a>>b;
 c=add(a,b);
 cout<<"sum="<<c<<endl;
 return 0;
}

float add(float x,float y)
{float z;
 z=x+y;
 return (z);
}

Ch4-4
#include <iostream>
using namespace std;
inline int max(int,int, int);
int main()
{
 int i=10,j=20,k=30,m;
 m=max(i,j,k);
 cout<<"max="<<m<<endl;
 return 0;
}
inline int max(int a,int b,int c)
{if(b>a) a=b;                          
 if(c>a) a=c;
 return a;
}

Ch4-5
#include <iostream>
using namespace std;
int main()
{int max(int a,int b,int c);
 double max(double a,double b,double c);
 long max(long a,long b,long c);
 int i1,i2,i3,i;
 cin>>i1>>i2>>i3;
 i=max(i1,i2,i3);
 cout<<"i_max="<<i<<endl;
 double d1,d2,d3,d;
 cin>>d1>>d2>>d3;
 d=max(d1,d2,d3);
 cout<<"d_max="<<d<<endl;
 long g1,g2,g3,g;
 cin>>g1>>g2>>g3;
 g=max(g1,g2,g3);
 cout<<"g_max="<<g<<endl;
 return 0;
}

int max(int a,int b,int c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

double max(double a,double b,double c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

long max(long a,long b,long c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

Ch4-6
#include <iostream>
using namespace std;
int main()
{int max(int a,int b,int c);
 int max(int a,int b);
 int a=8,b=-12,c=7;
 cout<<"max(a,b,c)="<<max(a,b,c)<<endl;
 cout<<"max(a,b)="<<max(a,b)<<endl;
 return 0;
}

int max(int a,int b,int c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

int max(int a,int b)
{if(a>b) return a;
 else return b;
}

Ch4-7
#include <iostream>
using namespace std;
template <typename T>
T max(T a,T b,T c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

int main()
{int i1=185,i2=-76,i3=567,i;
 double d1=56.87,d2=90.23,d3=-3214.76,d;
 long g1=67845,g2=-912456,g3=673456,g;
 i=max(i1,i2,i3);
 d=max(d1,d2,d3);
 g=max(g1,g2,g3);
 cout<<"i_max="<<i<<endl;
 cout<<"d_max="<<d<<endl;
 cout<<"g_max="<<g<<endl;
 return 0;
}

Ch4-8
#include <iostream>
using namespace std;
int main()
{int max(int a,int b,int c=0);
 int a,b,c;
 cin>>a>>b>>c;
 cout<<"max(a,b,c)="<<max(a,b,c)<<endl;
 cout<<"max(a,b)="<<max(a,b)<<endl;
 return 0;
}

int max(int a,int b,int c)
{if(b>a) a=b;
 if(c>a) a=c;
 return a;
}

Ch4-9
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
double root(double,double);
double f(double);
double xpoint(double,double);
 
int main()
{double x1,x2,f1,f2,x;
 do
  {
   cout<<"input x1,x2:";
   cin>>x1>>x2;
   f1=f(x1);
   f2=f(x2);
  }while(f1*f2>=0);
 x=root(x1,x2);
 cout<<setiosflags(ios::fixed)<<setprecision(7);
 cout<<"A root of equation is "<<x<<endl;
 return 0;
}

double f(double x)
{
 double y;
 y=x*x*x-5*x*x+16*x-80;
 return y;
}

double xpoint(double x1,double x2)
{
 double y;
 y=(x1*f(x2)-x2*f(x1))/(f(x2)-f(x1));
 return y;
}

double root(double x1,double x2)
{double x,y,y1;
 y1=f(x1);
 do
  {
   x=xpoint(x1,x2);
   y=f(x);
   if (y*y1>0)
    {y1=y;
     x1=x;
    }
   else
    x2=x;
  }while(fabs(y)>=0.000001);
 return x;
}

Ch4-10
#include <iostream>
using namespace std;
int age(int);
int main()
 {cout<<age(5)<<endl;
  return 0;
 }

int age(int n)
{
 int c;
 if(n==1) c=10;
 else c=age(n-1)+2;
 return c;
}

Ch4-11
#include <iostream>
using namespace std;
long fac(int);
int main()
 {int n;
  long y;
  cout<<"please input an integer:";
  cin>>n;
  y=fac(n);
  cout<<n<<"!="<<y<<endl;
  return 0;
 }

long fac(int n)
{
 long f;
 if(n<0)
  {cout<<"n<0,data error!"<<endl;
   f=-1;
  }
 else if (n==0||n==1) f=1;
 else f=fac(n-1)*n;
 return f;
}

Ch4-12
#include <iostream>
using namespace std;
int f(int a)
{auto int b=0;
 static int c=3;
 b=b+1;
 c=c+1;
 return a+b+c;
}

int main()
 {int a=2,i;
  for(i=0;i<3;i++)
	cout<<f(a)<<" ";
  cout<<endl;
  return 0;
 }

Ch4-13
#include <iostream>
using namespace std;
int fac(int);
int main()
 {
  int i;
  for(i=1;i<=5;i++)
   cout<<i<<"!="<<fac(i)<<endl;
   return 0;
 }

int fac(int n)
 {static int f=1;
  f=f*n;
  return f;
 }

Ch4-14
#include <iostream>
using namespace std;
int max(int,int);
int main()
 {extern int a,b;
  cout<<max(a,b)<<endl;
  return 0;
 }

int a=15,b=-7;
int max(int x,int y)
 {int z;
  z=x>y?x:y;
  return z;
 }

Ch4-15-1
//file1.cpp
#include <iostream>
using namespace std;
int main()
 { extern int max(int,int);
   int a,b;
   cin>>a>>b;
   cout<<max(a,b)<<endl;
   return 0;
 }

Ch4-15-2
//file2.cpp
int max(int x,int y)
{
 int z;
 z=x>y?x:y;
 return z;
 }

Ch4-16
#include <iostream>
using namespace std;
#define RUN
int main()
{int x=1,y=2,z=3;
 #ifndef RUN
  cout<<"x="<<x<<",y="<<y<<",z="<<z<<endl;
 #endif
 cout<<x*y*z<<endl;
 return 0;
}

第五章

Ch5-1
#include <iostream>
using namespace std;
int main()
{int i,a[10];
 for (i=0;i<=9;i++)
a[i]=i;
 for (i=9;i>=0;i--)
cout<<a[i]<<" ";
 cout<<endl;
 return 0;
}

Ch5-2
#include <iostream>
#include <iomanip>
using namespace std;
int main()
  {
    int i;
    int f[20]={1,1};
    for(i=2;i<20;i++) 
		f[i]=f[i-2]+f[i-1];
    for(i=0;i<20;i++)
      {
        if(i%5==0) cout<<endl;
        cout<<setw(8)<<f[i];
      }
	cout<<endl;
	return 0;
}

Ch5-3
#include <iostream>
using namespace std;
int main()
{
  int a[10];
  int i,j,t;
  cout<<"input 10 numbers :"<<endl;
  for (i=0;i<10;i++)
    cin>>a[i];
  cout<<endl;
  for (j=0;j<9;j++)
    for(i=0;i<9-j;i++)
       if (a[i]>a[i+1])
	   {t=a[i];a[i]=a[i+1];a[i+1]=t;}
  cout<<"the sorted numbers :"<<endl;
  for(i=0;i<10;i++)
	  cout<<a[i]<<" ";
  cout<<endl;
  return 0;
}

Ch5-4
#include <iostream> 
using namespace std;
int main()
{
 int a[2][3]={{1,2,3},{4,5,6}};
 int b[3][2],i,j;
 cout<<"array a:"<<endl;
 for (i=0;i<=1;i++)
 {
   for (j=0;j<=2;j++)
   {  cout<<a[i][j]<<" ";
      b[j][i]=a[i][j];
   }
   cout<<endl;
  }
  cout<<"array b:"<<endl;
  for (i=0;i<=2;i++)
  {
    for(j=0;j<=1;j++)
      cout<<b[i][j]<<" ";
    cout<<endl;             
   } 
  return 0;
}

Ch5-5
#include <iostream>
using namespace std;
int main()
{ int i,j,row=0,colum=0,max;
  int a[3][4]={{5,12,23,56},{19,28,37,46},{-12,-34,6,8}};
  max=a[0][0];
  for (i=0;i<=2;i++)
    for (j=0;j<=3;j++)
      if (a[i][j]>max)
	  {max=a[i][j];
        row=i;
        colum=j;
       }
  cout<<"max="<<max<<",row="<<row<<",colum="<<colum<<endl;
  return 0;
 }

Ch5-6
#include <iostream>
using namespace std;
int main()
{ int max_value(int x,int max);
  int i,j,row=0,colum=0,max;
  int a[3][4]={{5,12,23,56},{19,28,37,46},{-12,-34,6,8}};
  max=a[0][0];
  for (i=0;i<=2;i++)
    for (j=0;j<=3;j++)
	{
	 max=max_value(a[i][j],max);
	 if(max==a[i][j])
	 { row=i;
       colum=j;
      }
	}
  cout<<"max="<<max<<",row="<<row<<",colum="<<colum<<endl;
  return 0;
 }

int max_value(int x,int max)
{ if(x>max) return x;
  else return max;
}

Ch5-7
#include <iostream>
using namespace std;
int main()
{void select_sort(int array[],int n);             
 int a[10],i;
 cout<<"enter the originl array:"<<endl;
 for(i=0;i<10;i++)                                
   cin>>a[i];
 cout<<endl;
 select_sort(a,10);                              
 cout<<"the sorted array:"<<endl;
 for(i=0;i<10;i++)                             
   cout<<a[i]<<"  ";
 cout<<endl;
 return 0;
}

void select_sort(int array[],int n)              
{int i,j,k,t;
 for(i=0;i<n-1;i++)
 {k=i;
  for(j=i+1;j<n;j++)                    
    if(array[j]<array[k]) k=j;
 t=array[k];array[k]=array[i];array[i]=t;
}
}

Ch5-8
#include <iostream> 
using namespace std;
int main()
{int max_value(int array[][4]);
 int a[3][4]={{11,32,45,67},{22,44,66,88},{15,72,43,37}};
 cout<<"max value is "<<max_value(a)<<endl;
 return 0;
}
int max_value(int array[][4])
{int i,j,max;
 max=array[0][0];
 for( i=0;i<3;i++)
     for(j=0;j<4;j++)
       if(array[i][j]>max) max=array[i][j];
 return max;
}

Ch5-9
#include <iostream>
using namespace std;
int main()
{char diamond[][5]={{' ',' ','*'},{' ','*',' ','*'},{'*',' ',' ',' ','*'},{' ','*',' ','*'},{' ',' ','*'}};
 int i,j;
 for (i=0;i<5;i++)
   {for (j=0;j<5;j++)
     cout<<diamond[i][j];
    cout<<endl;
	}
  return 0;
 }

Ch5-10
#include <iostream>
#include <string>
using namespace std;
int main()
{ void max_string(char str[][30],int i);
  int i;
  char country_name[3][30];
  for(i=0;i<3;i++)
    cin>>country_name[i];
  max_string(country_name,3);
  return 0;
}

void max_string(char str[][30],int n)
{
  int i;
  char string[30];
  strcpy(string,str[0]);
  for(i=0;i<n;i++)
	  if(strcmp(str[i],string)>0) strcpy(string,str[i]);
  cout<<endl<<"the largest string is∶"<<string<<endl;
}

Ch5-11
#include <iostream>
#include <string>
using namespace std;
int main()
{void swap(string,string);
 string string1,string2,string3,temp;
 cout<<"please input three strings:";
 cin>>string1>>string2>>string3;
 if(string2>string3) {temp=string2;string2=string3;string3=temp;}
 if(string1<string2) cout<<string1<<" "<<string2<<" "<<string3<<endl;
 else if(string1<string3) cout<<string2<<" "<<string1<<" "<<string3<<endl;
 else cout<<string2<<" "<<string3<<" "<<string1<<endl;
 return 0;
}

Ch5-12
#include <iostream>
#include <string>
using namespace std;
string name[50],num[50];
int n;
int main()
{void input_data();
 void search(string find_name);
 string find_name;
 cout<<"please input number of this class:";
 cin>>n;
 input_data();
 cout<<"please input name you want find:";
 cin>>find_name;
 search(find_name);
 return 0;
}

void input_data()
{
 int i;
 for (i=0;i<n;i++)
   {cout<<"input name and number of student "<<i+1<<":";
    cin>>name[i]>>num[i];}
}

void search(string find_name)
{int i;
 bool flag=false;
 for(i=0;i<n;i++)
   if(name[i]==find_name)
     {cout<<name[i]<<" "<<num[i]<<endl;flag=true;break;}
 if(flag==false) cout<<"can't find this name";
}

第六章

Ch6-1
#include <iostream>
using namespace std;
int main()
{int a,b;
 int *pointer_1,*pointer_2;
 a=100;b=10;
 pointer_1=&a;      //把变量ａ的地址赋给pointer_1
 pointer_2=&b;      //把变量ｂ的地址赋给pointer_2
 cout<<a<<" "<<b<<endl;
 cout<<*pointer_1<<" "<<*pointer_2<<endl;
 return 0;
}

Ch6-2
#include  <iostream>
using namespace std;
int main()
{
  int *p1,*p2,*p,a,b;
  cin>>a>>b;
  p1=&a;
  p2=&b;
  if(a<b)
  {p=p1;p1=p2;p2=p;}
  cout<<"a="<<a<<" b="<<b<<endl;
  cout<<"max="<<*p1<<" min="<<*p2<<endl;
  return 0;
}

Ch6-3-1
#include  <iostream>
using namespace std;
int main()
{ void swap(int *p1,int *p2);
  int *pointer_1,*pointer_2,a,b;
  cin>>a>>b;
  pointer_1=&a;
  pointer_2=&b;
  if(a<b) swap(pointer_1,pointer_2);
  cout<<"max="<<a<<" min="<<b<<endl;
  return 0;
}

void swap(int *p1,int *p2)
{ int temp;
  temp=*p1;
  *p1=*p2;
  *p2=temp;
}

Ch6-3-2
#include  <iostream>
using namespace std;
int main()
{ void swap(int *p1,int *p2);
  int *pointer_1,*pointer_2,a,b;
  cin>>a>>b;
  pointer_1=&a;
  pointer_2=&b;
  if(a<b) swap(pointer_1,pointer_2);
  cout<<"max="<<a<<" min="<<b<<endl;
  return 0;
}

void swap(int *p1,int *p2)
{ int *temp;
  temp=p1;
  p1=p2;
  p2=temp;
}

Ch6-4
#include <iostream>
using namespace std;
int main()
{ void exchange(int *,int *,int *);
  int a,b,c,*p1,*p2,*p3;
  cin>>a>>b>>c;
  p1=&a;p2=&b;p3=&c;
  exchange(p1,p2,p3);
  cout<<a<<" "<<b<<" "<<c<<endl;
  return 0;
}

void exchange(int *q1,int *q2,int *q3)
{void swap(int *,int *);
 if(*q1<*q2) swap(q1,q2);
 if(*q1<*q3) swap(q1,q3);
 if(*q2<*q3) swap(q2,q3);
}

void swap(int *pt1,int *pt2)
{int temp;
 temp=*pt1;
 *pt1=*pt2;
 *pt2=temp;
}

Ch6-5-1
#include <iostream>
using namespace std;
int main()
{
  int a[10];
  int i;
  for(i=0;i<10;i++)
    cin>>a[i];
  cout<<endl;
  for(i=0;i<10;i++)
    cout<<a[i]<<" ";
  cout<<endl;
  return 0;
}

Ch6-5-2
#include <iostream>
using namespace std;
int main()
{
  int a[10];
  int i;
  for(i=0;i<10;i++)
    cin>>*(a+i);
  cout<<endl;
  for(i=0;i<10;i++)
    cout<<*(a+i)<<" ";
  cout<<endl;
  return 0;
}

Ch6-5-3
#include <iostream>
using namespace std;
int main()
{
  int a[10];
  int i,*p=a ;
  for(i=0;i<10;i++)
    cin>>*(p+i);
  cout<<endl;
    for(p=a;p<(a+10);p++)
    cout<<*p<<" ";
  cout<<endl;
  return 0;
}

Ch6-6
#include <iostream>
using namespace std;
int main()
{void select_sort(int *p,int n);             //函数声明
 int a[10],i;
 double c=3.6,*q=&c;
 cout<<"enter the originl array:"<<endl;
 for(i=0;i<10;i++)                                //输入10个数
   cin>>a[i];
 cout<<endl;
 select_sort(a,10);                              //函数调用，数组名作实参
 cout<<"the sorted array:"<<endl;
 for(i=0;i<10;i++)                               //输出10已排好序的数
   cout<<a[i]<<"  ";
 cout<<endl;
 return 0;
}

void select_sort(int *p,int n)              
{int i,j,k,t;
 for(i=0;i<n-1;i++)
 {k=i;
     for(j=i+1;j<n;j++)                     
       if(*(p+j)<*(p+k)) k=j;
	   t=*(p+k);*(p+k)=*(p+i);*(p+i)=t;
 }
}

Ch6-7
#include <iostream>
using namespace std;
int main()
{ int a[3][4]={1,3,5,7,9,11,13,15,17,19,21,23};
  int *p;
  for(p=a[0];p<a[0]+12;p++)
    cout<<*p<<" ";
  cout<<endl;
  return 0;
}

Ch6-8
#include <iostream>
using namespace std;
int main()
{ int a[3][4]={1,3,5,7,9,11,13,15,17,19,21,23};
  int (*p)[4],i,j;
  cin>>i>>j;
  p=a;
  cout<<*(*(p+i)+j)<<endl;
  return 0;
}

Ch6-9
#include <iostream>
using namespace std;
int main()
{ void output(int (*p)[4]);
  int a[3][4]={1,3,5,7,9,11,13,15,17,19,21,23};
  output(a);
  return 0;
}

void output(int (*p)[4])  
{ int i,j;
  for(i=0;i<3;i++)
	for(j=0;j<4;j++)  
      cout<<*(*(p+i)+j)<<" ";
  cout<<endl;
}

Ch6-10
#include <iostream>
using namespace std;
int main()
{ char str[]="I love CHINA!";
  cout<<str<<endl;
  return 0;
}

Ch6-11
#include <string>
#include <iostream>
using namespace std;
int main()
{ string str="I love CHINA!";
  cout<<str<<endl;
  return 0;
}

Ch6-12
#include <iostream>
using namespace std;
int main()
{ char *str="I love CHINA!";
  cout<<str<<endl;
  return 0;
}

Ch6-13
#include <iostream>
using namespace std;
int main()
{ char str1[]="I love CHINA!",str2[20],*p1,*p2;
  p1=str1;p2=str2;
  for(;*p1!='\0';p1++,p2++)
    *p2=*p1;
  *p2='\0';
  p1=str1;p2=str2;
  cout<<"str1 is: "<<p1<<endl;
  cout<<"str2 is: "<<p2<<endl;
  return 0;
}

Ch6-14-1
#include <iostream>
using namespace std;
int main()
{int max(int x,int y);              //函数声明
 int a,b,m;
 cin>>a>>b;
 m=max(a,b);                        //调用函数max，求出最大值，赋予m
 cout<<"max="<<m<<endl;
 return 0;
}

int max(int x,int y)
{int z;
 if(x>y) z=x;
 else z=y;
 return(z);
}

Ch6-14-2
#include <iostream>
using namespace std;
int main()
{int max(int x,int y);
 int (*p)(int,int);
 int a,b,m;
 p=max;
 cin>>a>>b;
 m=p(a,b);
 cout<<"max="<<m<<endl;
 return 0;
}

int max(int x,int y)
{int z;
 if(x>y) z=x;
 else z=y;
 return(z);
}

Ch6-15-1
#include <iostream>
using namespace std;
int main()
{ void sort(char *name[],int n);
  void print(char *name[],int n);
  char *name[]={"BASIC","FORTRAN","C++","PASCAL","COBOL"};
  int n=5;
  sort(name,n);
  print(name,n);
  return 0;
}
void sort(char *name[],int n)
{char *temp;
 int i,j,k;
 for(i=0;i<n-1;i++)
 {k=i;
  for(j=i+1;j<n;j++)
    if(strcmp(name[k],name[j])>0) k=j;
  if(k!=i)
  { temp=name[i];name[i]=name[k];name[k]=temp;}
 }
}

void print(char *name[],int n)
{int i;
 for(i=0;i<n;i++)
   cout<<name[i]<<endl;
}

Ch6-15-2
#include <iostream>
using namespace std;
int main()
{ void sort(char *name[],int n);
  void print(char *name[],int n);
  char *name[]={"BASIC","FORTRAN","C++","PASCAL","COBOL"};
  int n=5;
  sort(name,n);
  print(name,n);
  return 0;
}
void sort(char *name[],int n)
{char *temp;
 int i,j,k;
 for(i=0;i<n-1;i++)
 {k=i;
  for(j=i+1;j<n;j++)
    if(strcmp(name[k],name[j])>0) k=j;
  if(k!=i)
  { temp=name[i];name[i]=name[k];name[k]=temp;}
 }
}

void print(char *name[],int n)
{int i=0;
 char *p;
 p=name[0];
 while(i<n)
  {p=*(name+i++);
   cout<<p<<endl;
  }
}

Ch6-16
#include <iostream>
using namespace std;
int main()
{ char **p;
  char *name[]={"BASIC","FORTRAN","C++","PASCAL","COBOL"};
  p=name+2;
  cout<<*p<<endl;
  cout<<**p<<endl;
  return 0;
 }

Ch6-17
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
 int a=10;
 int &b=a;
 a=a*a;
 cout<<a<<setw(6)<<b<<endl;
 b=b/5;
 cout<<b<<setw(6)<<a<<endl;
 return 0;
}

Ch6-18
#include <iostream>
using namespace std;
int main()
{void swap(int,int);
 int i=3;
 int j=5;
 swap(i,j);
 cout<<i<<" "<<j<<endl;
 return 0;
}

void swap(int a,int b)
{int temp;
 temp=a;
 a=b;
 b=temp;
}

Ch6-19
#include <iostream>
using namespace std;
int main()
{void swap(int *,int *);
 int i=3,j=5;
 swap(&i,&j);
 cout<<i<<" "<<j<<endl;
 return 0;
}

void swap(int *p1,int *p2)
{int temp;
 temp=*p1;
 *p1=*p2;
 *p2=temp;
}

Ch6-20
#include <iostream>
using namespace std;
int main()
{void swap(int &,int &);
 int i=3,j=5;
 swap(i,j);
 cout<<"i="<<i<<" "<<"j="<<j<<endl;
 return 0;
}

void swap(int &a,int &b)
{int temp;
 temp=a;
 a=b;
 b=temp;
}

Ch6-21
#include <iostream>
using namespace std;
int main()
{void sort(int &,int &,int &);
 int a,b,c,a1,b1,c1;
 cout<<"Please enter 3 integers:";
 cin>>a>>b>>c;
 a1=a;b1=b;c1=c;
 sort(a1,b1,c1);
 cout<<a<<" "<<b<<" "<<c<<" in sorted order is ";
 cout<<a1<<" "<<b1<<" "<<c1<<endl;
 return 0;
}
void sort(int &i,int &j,int &k)
{ void change(int &,int &);
  if (i>j) change(i,j);
  if (i>k) change(i,k);
  if (j>k) change(j,k);
}
void change(int &x,int &y)
{ int temp;
  temp=x;
  x=y;
  y=temp;
}

第七章

Ch7-1
#include <iostream>
using namespace std;
struct Date
  {int month;
   int day;
   int year;
  };
 struct Student
  {int num;
   char name[20];
   char sex;
   Date birthday;
   float score;
  }student1,student2={10002,"Wang Li",'f',5,23,1982,89.5};

int main()
{student1=student2;
 cout<<student1.num<<endl;
 cout<<student1.name<<endl;
 cout<<student1.sex<<endl;
 cout<<student1.birthday.month<<'/'<<student1.birthday.day<<'/';
 cout<<student1.birthday.year<<endl;
 cout<<student1.score<<endl;
 return 0;
}

Ch7-2-1
#include <iostream>
#include <string>
using namespace std;
struct Person
 { char name[20];
   int count;
 };
int main()
 {Person leader[3]={"Li",0,"Zhang",0,"Fun",0};
  int i,j;
  char leader_name[20];
  for(i=0;i<10;i++)
    {cin>>leader_name;
     for(j=0;j<3;j++)
       if(strcmp(leader_name,leader[j].name)==0) leader[j].count++;
     }
  cout<<endl;
  for(i=0;i<3;i++)
    {cout<<leader[i].name<<":"<<leader[i].count<<endl;}
  return 0;
 }

Ch7-2-2
#include <iostream>
#include <string>
using namespace std;
struct Person
 { string name;
   int count;
 };
int main()
 {Person leader[3]={"Li",0,"Zhang",0,"Fun",0};
  int i,j;
  string leader_name;
  for(i=0;i<3;i++)
    {cin>>leader_name;
     for(j=0;j<10;j++)
       if(leader_name==leader[j].name) leader[j].count++;
     }
  cout<<endl;
  for(i=0;i<3;i++)
    {cout<<leader[i].name<<":"<<leader[i].count<<endl;}
  return 0;
 }

Ch7-3
#include <iostream>
#include <string>
using namespace std;
int main()
 {struct student
   {int num;
    string name;
    char sex;
    float score;
 };
 student stu;
 student *p=&stu;
 stu.num=10301;
 stu.name="Wang Fun";
 stu.sex='f';
 stu.score=89.5;
 cout<<stu.num<<" "<<stu.name<<" "<<stu.sex<<" "<<stu.score<<endl;
 cout<<(*p).num<<" "<<(*p).name<<" "<<(*p).sex<<" "<<(*p).score<<endl;
 return 0;
}

Ch7-4
#define NULL 0   
#include <iostream>
using namespace std; 
struct Student
 {long num;
  float score;
  struct Student *next;
 };
int main()
{Student a,b,c,*head,*p;
 a.num=31001; a.score=89.5;
 b.num=31003; b.score=90;
 c.num=31007; c.score=85;
 head=&a;
 a.next=&b;
 b.next=&c;
 c.next=NULL;
 p=head;
 do        
   {cout<<p->num<<"  "<<p->score<<endl;
    p=p->next;
   } while(p!=NULL);
 return 0;
}

Ch7-5-1
#include <iostream>
#include <string>
using namespace std;
struct Student
{int num;
 string name;
 float score[3];
};
int main()
{void print(Student);
 Student stu;
 stu.num=12345;
 stu.name="Li Fung";
 stu.score[0]=67.5;
 stu.score[1]=89;
 stu.score[2]=78.5;
 print(stu);
 return 0;
}

void print(Student stu)
{cout<<stu.num<<" "<<stu.name<<" "<<stu.score[0]<<" "
     <<stu.score[1]<<" "<<stu.score[2]<<endl;
}

Ch7-5-2
#include <iostream>
#include <string>
using namespace std;
struct Student
{int num;
 string name;
 float score[3];
}stu={12345,"Li Fung",67.5,89,78.5};

int main()
{void print(Student *);
 Student *pt=&stu;
 print(pt);
 return 0;
}

void print(Student *p)
{cout<<p->num<<" "<<p->name<<" "<<p->score[0]<<" "
     <<p->score[1]<<" "<<p->score[2]<<endl;
}

Ch7-5-3
#include <iostream>
#include <string>
using namespace std;
struct Student
{int num;
 string name;
 float score[3];
}stu={12345,"Li Fung",67.5,89,78.5};

int main()
{void print(Student &);
 print(stu);
 return 0;
}

void print(Student &stud)
{cout<<stud.num<<" "<<stud.name<<" "<<stud.score[0]<<" "<<stud.score[1]<<" "<<stud.score[2]<<endl;
}

Ch7-6
#include <iostream>
#include <string>
using namespace std;
struct Student 
{string name;
 int num;
 char sex;
};
int main ( )
{
 Student *p;
 p=new Student;
 p->name="Wang Fun";
 p->num=10123;
 p->sex='m';
 cout<<p->name<<endl<<p->num<<endl<<p->sex<<endl;
 delete p;
 return 0;
}

Ch7-7
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
struct S
  {int num;
   string name;
   char sex;
   char job;
   union
     {int grade;
      char position[10];
     }category;
  }person[2];

int main()
{ int i;
  for(i=0;i<2;i++)
   {cin>>person[i].num>>person[i].name>>person[i].sex>>person[i].job;
    if(person[i].job=='s') cin>>person[i].category.grade;
    else if (person[i].job=='t') cin>>person[i].category.position;
        else cout<<"input error!";
   }
  cout<<endl<<"No.  Name   sex  job  grade/position"<<endl;
  for(i=0;i<2;i++)
    {if (person[i].job=='s')
      cout<<person[i].num<<setw(6)<<person[i].name<<"    "<<person[i].sex
      <<"    "<<person[i].job<<setw(10)<<person[i].category.grade<<endl;
     else
      cout<<person[i].num<<setw(6)<<person[i].name<<"    "<<person[i].sex
      <<"    "<<person[i].job<<setw(10)<<person[i].category.position<<endl;
    }
  return 0;
 }

Ch7-8
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{enum color {red,yellow,blue,white,black};
 color pri;
 int i,j,k,n=0,loop;
 for (i=red;i<=black;i++)
   for (j=red;j<=black;j++)
     if (i!=j)
      { for (k=red;k<=black;k++)
        if ((k!=i) && (k!=j))
         {n=n+1;
          cout<<n;
          for (loop=1;loop<=3;loop++)
           {switch (loop)
             {case 1: pri=color(i);break;
              case 2: pri=color(j);break;
              case 3: pri=color(k);break;
              default:break;
             }
          switch (pri)
            {case red:    cout<<setw(8)<<"red"; break;
             case yellow: cout<<setw(8)<<"yellow"; break;
             case blue:   cout<<setw(8)<<"blue"; break;
             case white:  cout<<setw(8)<<"white"; break;
             case black:  cout<<setw(8)<<"black"; break;
             default   :                   break;
            }
         }
      cout<<endl;
     }
   }
   cout<<"total:"<<n<<endl;
   return 0;
}

第八章

Ch8-1
#include <iostream>
using namespace std;
class Time
 {public:
  int hour;
  int minute;
  int sec;
 };
int main()
 { Time t1;
   Time &t2=t1;
   cin>>t2.hour;
   cin>>t2.minute;
   cin>>t1.sec;
   cout<<t1.hour<<":"<<t1.minute<<":"<<t2.sec<<endl;
 }

Ch8-2-a
#include <iostream>
using namespace std;
class Time
 {public:
  int hour;
  int minute;
  int sec;
 };
int main()
 {Time t1;
  cin>>t1.hour;
  cin>>t1.minute;
  cin>>t1.sec;
  cout<<t1.hour<<":"<<t1.minute<<":"<<t1.sec<<endl;
  Time t2;
  cin>>t2.hour;
  cin>>t2.minute;
  cin>>t2.sec;
  cout<<t2.hour<<":"<<t2.minute<<":"<<t2.sec<<endl;
  return 0;
 }

Ch8-2-b
#include <iostream>
using namespace std;
class Time
 {public:
  int hour;
  int minute;
  int sec;
 };
int main()
 {
  void set_time(Time&) ;
  void show_time(Time&);
  Time t1;
  set_time(t1);
  show_time(t1);
  Time t2;
  set_time(t2);
  show_time(t2);
  return 0;
 }
 
void set_time(Time& t)
 {
  cin>>t.hour;
  cin>>t.minute;
  cin>>t.sec;
 }
 
void show_time(Time& t)
 {
  cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;
 }

Ch8-2-c
#include <iostream>
using namespace std;
class Time
 {public:
  int hour;
  int minute;
  int sec;
 };
int main()
 {
  void set_time(Time&,int hour=0,int minute=0,int sec=0);
  void show_time(Time&);
  Time t1;
  set_time(t1,12,23,34);
  show_time(t1);
  Time t2;
  set_time(t2);
  show_time(t2);
  return 0;
 }
 
void set_time(Time& t,int hour=9,int minute=30,int sec=0)
 {
  t.hour=hour;
  t.minute=minute;
  t.sec=sec;
 }
 
void show_time(Time& t)
 {
  cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;
 }

Ch8-3
#include <iostream>
using namespace std;
class Time
 {public:
   void set_time() ;
   void show_time();
  private:
   int hour;
   int minute;
   int sec;
 };
int main()
 {
  Time t1;
  t1.set_time();
  t1.show_time();
  Time t2;
  t2.set_time();
  t2.show_time();
  return 0;
 }
 
void Time::set_time()
 {
  cin>>hour;
  cin>>minute;
  cin>>sec;
 }
 
void Time::show_time()
 {
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }

Ch8-4
#include <iostream>
using namespace std;
class Array_max
{public:
   void set_value();
   void max_value();
   void show_value();
 private:
   int array[10];
   int max;
};

void Array_max::set_value()
 { int i;
   for (i=0;i<10;i++)
     cin>>array[i];
 }

void Array_max::max_value()
 {int i;
  max=array[0];
  for (i=1;i<10;i++)
   if(array[i]>max) max=array[i];
  }

void Array_max::show_value()
 {cout<<"max="<<max;
 }

int main()
 {Array_max  arrmax;
  arrmax.set_value();
  arrmax.max_value();
  arrmax.show_value();
  return 0;
 }

Main
//main.cpp
#include <iostream>
#include "student.h"
int main()
{Student stud;
 stud.display();
 return 0;
}

Student
//student.cpp                            这是源文件，在此文件中进行函数的定义
#include <iostream>
#include "student.h"                    //不要漏写此行
void Student::display( )                 //在类外定义display类函数
{cout<<"num:"<<num<<endl;
 cout<<"name:"<<name<<endl;
 cout<<"sex:"<<sex<<endl;
}

第九章

Ch9-1
#include <iostream>
using namespace std;
class Time
 {public:
   Time()
   {hour=0;
    minute=0;
    sec=0;
   }  
   void set_time();
   void show_time();
  private:
   int hour;
   int minute;
   int sec;
 };

void Time::set_time()
{cin>>hour;
 cin>>minute;
 cin>>sec;
}

void Time::show_time()
 {
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }

int main()
 {
  Time t1;
  t1.show_time();
  Time t2;
  t2.show_time();
  return 0;
 }

Ch9-1-1
#include <iostream>
using namespace std;

class Time
 {public:
   Time()
   {hour=0;
    minute=0;
    sec=0;
   }
   void set_time();
   void show_time();
  private:
   int hour;
   int minute;
   int sec;
 };
int main()
 {
  Time t1;
  t1.set_time();
  t1.show_time();
  Time t2;
  t2.show_time();
  return 0;
 }

void Time::set_time()
{cin>>hour;
 cin>>minute;
 cin>>sec;
}

void Time::show_time()
 {
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }

Ch9-1-2
#include <iostream>
using namespace std;

class Time
 {public:
   Time();
   void show_time();
  private:
   int hour;
   int minute;
   int sec;
 };

Time::Time()
 {
  hour=0;
  minute=0;
  sec=0;
 }

int main()
 {
  Time t1;
  t1.show_time();
  Time t2;
  t2.show_time();
  return 0;
 }
 
void Time::show_time()
 {
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }

Ch9-2
#include <iostream>
using namespace std;
class Box
 {public:
   Box(int,int,int);
   int volume();
  private:
   int height;
   int width;
   int length;
 };
Box::Box(int h,int w,int len)
 {height=h;
  width=w;
  length=len;
 }

int Box::volume()
 {return(height*width*length);
 }
 
    
int main()
 {
  Box box1(12,25,30);
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2(15,30,21);
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  return 0;
 }

Ch9-3
#include <iostream>
using namespace std;
class Box
 {public:
   Box();                  
   Box(int h,int w ,int len):height(h),width(w),length(len){}
   int volume();
  private:
   int height;
   int width;
   int length;
 };
Box::Box()                 
 {height=10;
  width=10;
  length=10;
 }

int Box::volume()
 {return(height*width*length);
 }
    
int main()
 {
  Box box1;                                    
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2(15,30,25);                          
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  return 0;
 }

Ch9-4
#include <iostream>
using namespace std;
class Box
 {public:
   Box(int w=10,int h=10,int len=10);
   int volume();
  private:
   int height;
   int width;
   int length;
 };

Box::Box(int w,int h,int len)
 {height=h;
  width=w;
  length=len;
 }

int Box::volume()
 {return(height*width*length);
 }
 
    
int main()
 {
  Box box1;
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2(15);
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  Box box3(15,30);
  cout<<"The volume of box3 is "<<box3.volume()<<endl;
  Box box4(15,30,20);
  cout<<"The volume of box4 is "<<box4.volume()<<endl;
  return 0;
 }

Ch9-4-2
#include <iostream>
using namespace std;
class Box
 {public:
   Box(int=10,int=10,int=10);
   int volume();
  private:
   int height;
   int width;
   int length;
 };
 
Box::Box(int h,int w,int len):height(h),width(w),length(len)
{ }

int Box::volume()
 {return(height*width*length);
 }
 
    
int main()
 {
  Box box1;
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2(15);
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  Box box3(15,30);
  cout<<"The volume of box3 is "<<box3.volume()<<endl;
  Box box4(15,30,20);
  cout<<"The volume of box4 is "<<box4.volume()<<endl;
  return 0;
 }

Ch9-5
#include <iostream>
#include <string>
using namespace std;
class Student
 {public:
   Student(int n,string nam,char s)
    {num=n;
     name=nam;
     sex=s;
     cout<<"Constructor called."<<endl;
    }
   ~Student()
   {cout<<"Destructor called."<<endl;}
   void display()
   {cout<<"num:"<<num<<endl;
    cout<<"name:"<<name<<endl;
	cout<<"sex:"<<sex<<endl<<endl;
   }
  private:
    int num;
    string name;
    char sex;
};

int main()
  {Student stud1(10010,"Wang_li",'f');
   stud1.display();
   Student stud2(10011,"Zhang_fun",'m');
   stud2.display();
   return 0;
}

Ch9-6
#include <iostream>
using namespace std;

class Box
 {public:
   Box(int h=10,int w=12,int len=15):height(h),width(w),length(len){ }
   int volume();
  private:
   int height;
   int width;
   int length;
 };

int Box::volume()
 {return(height*width*length);
 }
    
int main()
 {
  Box a[3]={
   Box(10,12,15),
   Box(15,18,20),
   Box(16,20,26)
   };
  cout<<"volume of a[0] is "<<a[0].volume()<<endl;
  cout<<"volume of a[0] is "<<a[1].volume()<<endl;
  cout<<"volume of a[0] is "<<a[2].volume()<<endl;
  return 0;
 }

Ch9-7
#include <iostream>
using namespace std;
 class Time
 {public:
   Time(int,int,int);
   int hour;
   int minute;
   int sec;
   void get_time();
 };
 Time::Time(int h,int m,int s)
 {hour=h;
  minute=m;
  sec=s;
 }
void Time::get_time()
   {cout<<hour<<":"<<minute<<":"<<sec<<endl;}

int main()
 {Time t1(10,13,56);
  int *p1=&t1.hour;
  cout<<*p1<<endl;
  t1.get_time();
  Time *p2=&t1;
  p2->get_time();
  void (Time::*p3)();
  p3=&Time::get_time;
  (t1.*p3)();
  return 0;
}

Ch9-8
#include <iostream>
using namespace std;
class Time
 {public:
   Time(int,int,int);
   int hour;
   int minute;
   int sec;
 };
 Time::Time(int h,int m,int s)
 {hour=h;
  minute=m;
  sec=s;
 }
 
void fun(Time &t)
{t.hour=18;}

int main()
{Time t1(10,13,56);
 fun(t1);
 cout<<t1.hour<<endl;
 return 0;
}

Ch9-9
#include <iostream>
using namespace std;
class Box
 {public:
   Box(int=10,int=10,int=10);               
   int volume();
  private:
   int height;
   int width;
   int length;
 };

Box::Box(int h,int w,int len)
 {height=h;
  width=w;
  length=len;
 }

int Box::volume()
 {return(height*width*length);      
 }
     
int main()
 {
  Box box1(15,30,25),box2;                       
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  box2=box1;                                   
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  return 0;
 }

Ch9-9-2
#include <iostream>
using namespace std;

class Box
 {public:
   Box(int=10,int=10,int=10);
   int volume();
  private:
   int height;
   int width;
   int length;
 };

Box::Box(int h,int w,int len)
 {height=h;
  width=w;
  length=len;
 }
int Box::volume()
 {return(height*width*length);
 }
 
    
int main()
 {Box box1(15,30,25);
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2=box1,box3=box2;
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  cout<<"The volume of box3 is "<<box3.volume()<<endl;
  return 0;
  
 }

Ch9-10
#include <iostream>
using namespace std;

class Box
 {public:
   Box(int,int);
   int volume();
   static int height;
   int width;
   int length;
 };

Box::Box(int w,int len)
 {
  width=w;
  length=len;
 }
int Box::volume()
 {return(height*width*length);
 }
int Box::height=10;

int main()
 {
  Box a(15,20),b(20,30);
  cout<<a.height<<endl;
  cout<<b.height<<endl;
  cout<<Box::height<<endl;
  cout<<a.volume()<<endl;
  return 0;
 }

Ch9-11
#include <iostream>
using namespace std;
class Student
 {public:
   Student(int,int,int);
   void total();
   static float average();
  private:
   int num;
   int age;
   float score;
   static float sum;
   static int count;
 };

 Student::Student(int m,int a,int s)
 {num=m;
  age=a;
  score=s;
 }
 
void Student::total()
   {
    sum+=score;
    count++;
   }
   
float  Student::average()
 { return(sum/count);
 }

float Student::sum=0;
int Student::count=0;

int main()
 {
   Student stud[3]={
     Student(1001,18,70),
     Student(1002,19,79),
     Student(1005,20,98)
    };
   int n;
   cout<<"please input the number of students:";
   cin>>n;
   for(int i=0;i<n;i++)
     stud[i].total();
   cout<<"The average score of "<<n<<" students is "<<stud[0].average()<<endl;
   return 0;
 }

Ch9-12
#include <iostream>
using namespace std;

class Time
 {public:
   Time(int,int,int);
   friend void display(Time &);
  private:
   int hour;
   int minute;
   int sec;
 };
 Time::Time(int h,int m,int s)
 {hour=h;
  minute=m;
  sec=s;
 }
void display(Time &t)
 {
  cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;
 }
   
int main()
{
 Time t1(10,13,56);
 display(t1);
 return 0;
}

Ch9-13
#include <iostream>
using namespace std;
class Date;
class Time
 {public:
   Time(int,int,int);
   void display(const Date&);
  private:
   int hour;
   int minute;
   int sec;
 };

 class Date
 {public:
   Date(int,int,int);
   friend void Time::display(const Date &);
  private:
   int month;
   int day;
   int year;
 };

 Time::Time(int h,int m,int s)
 {hour=h;
  minute=m;
  sec=s;
 }

void Time::display(const Date &da)
 {cout<<da.month<<"/"<<da.day<<"/"<<da.year<<endl;
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }
 
 
Date::Date(int m,int d,int y)
 {month=m;
  day=d;
  year=y;
 }
   
int main()
{Time t1(10,13,56);
 Date d1(12,25,2004);
 t1.display(d1);
 return 0;
}

Ch9-14
#include <iostream>
using namespace std;
template<class numtype>
class Compare
 {public:
   Compare(numtype a,numtype b)
    {x=a;y=b;}
   numtype max()
    {return (x>y)?x:y;}
   numtype min()
    {return (x<y)?x:y;}
  private:
    numtype x,y;
 };
int main()
{Compare<int> cmp1(3,7);
 cout<<cmp1.max()<<" is the Maximum of two inteder numbers."<<endl;
 cout<<cmp1.min()<<" is the Minimum of two inteder numbers."<<endl<<endl;
 Compare<float> cmp2(45.78,93.6);
 cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;
 cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl;
 Compare<char> cmp3('a','A');
 cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;
 cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;
 return 0;
}

第十章

Ch10-1
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex complex_add(Complex &c2);
   void display();
  private:
   double real;
   double imag;
 };
Complex Complex::complex_add(Complex &c2)
{return Complex(real+c2.real,imag+c2.imag);}
   
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1.complex_add(c2);
 cout<<"c1="; c1.display();
 cout<<"c2="; c2.display();
 cout<<"c1+c2="; c3.display();
 return 0;
}

Ch10-2
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator + (Complex &c2);
   void display();
  private:
   double real;
   double imag;
 };
Complex Complex::operator + (Complex &c2)
{Complex c;
 c.real=real+c2.real;
 c.imag=imag+c2.imag;
return c;}
   
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+c2;
 cout<<"c1=";c1.display();
 cout<<"c2=";c2.display();
 cout<<"c1+c2=";c3.display();
 return 0;
}

Ch10-2-2
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator + (Complex &c2);
   void display();
  private:
   double real;
   double imag;
 };
Complex Complex::operator + (Complex &c2)
 {return Complex(real+c2.real,imag+c2.imag);}
   
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+c2;
 cout<<"c1="; c1.display();
 cout<<"c2="; c2.display();
 cout<<"c1+c2="; c3.display();
 return 0;
}

Ch10-3
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r){real=r;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   friend Complex operator+ (Complex &c1,Complex &c2);
   void display();
  private:
   double real;
   double imag;
 };

Complex operator+ (Complex &c1,Complex &c2)
 {return Complex(c1.real+c2.real, c1.imag+c2.imag);}
   
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+c2;
 cout<<"c1="; c1.display();
 cout<<"c2="; c2.display();
 cout<<"c1+c2="; c3.display();
 return 0;
}

Ch10-4-1
#include <iostream>
using namespace std;
class String           //String 是用户自己指定的类名
 {public:
   String(){p=NULL;}
   String(char *str);
   void display();
  private:
   char *p;
 };
 
String::String(char *str)
  {p=str;}

void String::display()
  {cout<<p;}

int main()
  {String string1("Hello"),string2("Book");
   string1.display();
   cout<<endl;
   string2.display();
   return 0;
}

Ch10-4-2(vc)
//本程序适用于VC++ 6.0
#include <iostream.h>
#include <string.h>
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
   void display();
  private:
   char *p;
 };
 
String::String(char *str)
  {p=str;}

void String::display()
{cout<<p;}


bool operator>(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)>0)
    return true;
   else return false;
  }

int main()
{String string1("Hello"),string2("Book");
 cout<<(string1>string2)<<endl;
 return 0;
}

Ch10-4-2
#include <iostream>
#include <cstring>
using namespace std;
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
   void display();
  private:
   char *p;
 };
 
String::String(char *str)
  {p=str;}

void String::display()
{cout<<p;}


bool operator>(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)>0)
    return true;
   else return false;
  }

int main()
{String string1("Hello"),string2("Book");
 cout<<(string1>string2)<<endl;
 return 0;
}

Ch10-4-3(vc)
//本程序适用于VC++ 6.0
#include <iostream.h>
#include <string.h>
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
   void display();
  private:
   char *p;
 };
 
String::String(char *str)
  {p=str;}

void String::display()
{cout<<p;}

bool operator>(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)>0)
    return true;
   else
    return false;
  }

bool operator<(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)<0)
    return true;
   else
    return false;
  }

bool operator==(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)==0)
    return true;
   else
    return false;
  }

int main()
{String string1("Hello"),string2("Book"),string3("Computer");
 cout<<(string1>string2)<<endl;
 cout<<(string1<string3)<<endl;
 cout<<(string1==string2)<<endl;
 return 0;
}

Ch10-4-3
#include <iostream>
#include <string>
using namespace std;
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
   void display();
  private:
   char *p;
 };
 
String::String(char *str)
  {p=str;}

void String::display()
{cout<<p;}

bool operator>(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)>0)
    return true;
   else
    return false;
  }

bool operator<(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)<0)
    return true;
   else
    return false;
  }

bool operator==(String &string1,String &string2)
  {if(strcmp(string1.p,string2.p)==0)
    return true;
   else
    return false;
  }

int main()
{String string1("Hello"),string2("Book"),string3("Computer");
 cout<<(string1>string2)<<endl;
 cout<<(string1<string3)<<endl;
 cout<<(string1==string2)<<endl;
 return 0;
}

Ch10-4-4(vc)
//本程序适用于VC++ 6.0
#include <iostream.h>
#include <string.h>
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
  void display();
  private:
   char *p;
 };
 
String::String(char *str)
{p=str;
}

void String::display()
 {cout<<p;}
 
bool operator>(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)>0)
   return true;
 else
   return false;
}

bool operator<(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)<0)
   return true;
 else
   return false;
}

bool operator==(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)==0)
   return true;
 else
   return false;
}

void compare(String &string1,String &string2)
{if(operator>(string1,string2)==1)
  {string1.display();cout<<">";string2.display();}
 else
  if(operator<(string1,string2)==1)
   {string1.display();cout<<"<";string2.display();}
 else
  if(operator==(string1,string2)==1)
   {string1.display();cout<<"=";string2.display();}
 cout<<endl;
}

int main()
{String string1("Hello"),string2("Book"),string3("Computer"),string4("Hello");
 compare(string1,string2);
 compare(string2,string3);
 compare(string1,string4);
 return 0;
}

Ch10-4-4
#include <iostream>
#include <cstring>
using namespace std;
class String
 {public:
   String(){p=NULL;}
   String(char *str);
   friend bool operator>(String &string1,String &string2);
   friend bool operator<(String &string1,String &string2);
   friend bool operator==(String &string1,String &string2);
  void display();
  private:
   char *p;
 };
 
String::String(char *str)
{p=str;
}

void String::display()
 {cout<<p;}
 
bool operator>(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)>0)
   return true;
 else
   return false;
}

bool operator<(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)<0)
   return true;
 else
   return false;
}

bool operator==(String &string1,String &string2)
{if(strcmp(string1.p,string2.p)==0)
   return true;
 else
   return false;
}

void compare(String &string1,String &string2)
{if(operator>(string1,string2)==1)
  {string1.display();cout<<">";string2.display();}
 else
  if(operator<(string1,string2)==1)
   {string1.display();cout<<"<";string2.display();}
 else
  if(operator==(string1,string2)==1)
   {string1.display();cout<<"=";string2.display();}
 cout<<endl;
}

int main()
{String string1("Hello"),string2("Book"),string3("Computer"),string4("Hello");
 compare(string1,string2);
 compare(string2,string3);
 compare(string1,string4);
 return 0;
}

Ch10-5
#include <iostream>
using namespace std;
class Time
{public:
   Time(){minute=0;sec=0;}
   Time(int m,int s):minute(m),sec(s){}
   Time operator++();
   void display(){cout<<minute<<":"<<sec<<endl;}
  private:
   int minute;
   int sec;
 };

Time Time::operator++()
{if(++sec>=60)
  {sec-=60;
   ++minute;}
   return *this;
}
   
int main()
{Time time1(34,0);
 for (int i=0;i<61;i++)
	{++time1;
     time1.display();}
 return 0;
}

Ch10-6
#include <iostream>
using namespace std;
class Time
{public:
   Time(){minute=0;sec=0;}
   Time(int m,int s):minute(m),sec(s){}
   Time operator++();
   Time operator++(int);
   void display(){cout<<minute<<":"<<sec<<endl;}
  private:
   int minute;
   int sec;
 };
 

Time Time::operator++()
{if(++sec>=60)
  {sec-=60;
   ++minute;}
 return *this;
}
Time Time::operator++(int)
{Time temp(*this);
 sec++;
 if(sec>=60)
  {sec-=60;
   ++minute;}
 return temp;
}

   
int main()
{Time time1(34,59),time2;
 cout<<" time1 : ";
 time1.display();
 ++time1;
 cout<<"++time1: ";
 time1.display();
 time2=time1++;
 cout<<"time1++: ";
 time1.display();
 cout<<" time2 : ";
 time2.display();
 return 0;
}

Ch10-7(vc)
//本程序适用于VC++ 6.0
#include <iostream.h>          
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator + (Complex &c2);
   friend ostream& operator << (ostream&,Complex&);
  private:
   double real;
   double imag;
 };
Complex Complex::operator + (Complex &c2)
 {return Complex(real+c2.real,imag+c2.imag);}
   
ostream& operator << (ostream& output,Complex& c)
{output<<"("<<c.real<<"+"<<c.imag<<"i)"<<endl;
 return output;
}

int  main()
{Complex c1(2,4),c2(6,10),c3;
 c3=c1+c2;
 cout<<c3;
 return 0;
}

Ch10-7
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator + (Complex &c2);
   friend ostream& operator << (ostream&,Complex&);
  private:
   double real;
   double imag;
 };
Complex Complex::operator + (Complex &c2)
 {return Complex(real+c2.real,imag+c2.imag);}
   
ostream& operator << (ostream& output,Complex& c)
{output<<"("<<c.real<<"+"<<c.imag<<"i)"<<endl;
 return output;
}

int  main()
{Complex c1(2,4),c2(6,10),c3;
 c3=c1+c2;
 cout<<c3;
 return 0;
}

Ch10-8(vc)
//本程序适用于VC++ 6.0
#include <iostream.h>
class Complex
 {public:
   friend ostream& operator << (ostream&,Complex&);
   friend istream& operator >> (istream&,Complex&);
  private:
   double real;
   double imag;
 };
   
ostream& operator << (ostream& output,Complex& c)
{output<<"("<<c.real;
 if(c.imag>=0) output<<"+";
 output<<c.imag<<"i)";
 return output;
}

istream& operator >> (istream& input,Complex& c)
{cout<<"input real part and imaginary part of complex number:";
 input>>c.real>>c.imag;
 return input;
}

int main()
{Complex c1,c2;
 cin>>c1>>c2;
 cout<<"c1="<<c1<<endl;
 cout<<"c2="<<c2<<endl;
 return 0;
}

Ch10-8
#include <iostream>
using namespace std;
class Complex
 {public:
   friend ostream& operator << (ostream&,Complex&);
   friend istream& operator >> (istream&,Complex&);
  private:
   double real;
   double imag;
 };
   
ostream& operator << (ostream& output,Complex& c)
{output<<"("<<c.real<<"+"<<c.imag<<"i)";
 return output;
}

istream& operator >> (istream& input,Complex& c)
{cout<<"input real part and imaginary part of complex number:";
 input>>c.real>>c.imag;
 return input;
}


int main()
{Complex c1,c2;
 cin>>c1>>c2;
 cout<<"c1="<<c1<<endl;
 cout<<"c2="<<c2<<endl;
 return 0;
}

Ch10-9
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   operator double() {return real;}    
  private:
   double real;
   double imag;
 };
 
int main()
{Complex c1(3,4),c2(5,-10),c3;
 double d;
 d=2.5+c1;
 cout<<d<<endl;
 return 0;
}

Ch10-10
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r){real=r;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   friend Complex operator + (Complex c1,Complex c2);
   void display();
  private:
   double real;
   double imag;
 };
 
Complex operator + (Complex c1,Complex c2)
 {return Complex(c1.real+c2.real, c1.imag+c2.imag);}
   
void Complex::display()
{cout<<"("<<real<<"+"<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+2.5;
 c3.display();
 return 0;
}

Ch10-10-2
#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r){real=r;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   operator double(){cout<<return real;}
   friend Complex operator + (Complex c1,Complex c2);                
   void display();
  private:
   double real;
   double imag;
 };
 
Complex operator + (Complex c1,Complex c2)
 {return Complex(c1.real+c2.real, c1.imag+c2.imag);}
   
void Complex::display()
{cout<<"("<<real<<","<<imag<<"i)"<<endl;}

int main()
{Complex c1(3,4),c2(5,-10),c3;
 c3=c1+2.5;
 c3.display();
 return 0;
}

第十一章

Ch11-1
#include <iostream>
#include <string>
using namespace std;
class Student
{public:
  void get_value()
   {cin>>num>>name>>sex;}
  void display( )
    {cout<<"num: "<<num<<endl;
     cout<<"name: "<<name<<endl;
     cout<<"sex: "<<sex<<endl;}
 private :
   int num;
   string name;
   char sex;
};   

class Student1: public Student
 {public:
   void get_value_1()
    {cin>>age>>addr;}
   void display_1()
    {  //cout<<"num: "<<num<<endl;        //企图引用基类的私有成员，错误
       //cout<<"name: "<<name<<endl;      //企图引用基类的私有成员，错误
       //cout<<"sex: "<<sex<<endl;        //企图引用基类的私有成员，错误
       cout<<"age: "<<age<<endl;          //引用派生类的私有成员，正确
       cout<<"address: "<<addr<<endl;}    //引用派生类的私有成员，正确
  private:
       int age;
       string addr;
 };
 
int main()
 {Student1 stud1;
  stud1.get_value();
  stud1.get_value_1();
  stud1.display();
  stud1.display_1();
  return 0;
}

Ch11-2
#include <iostream>
#include <string>
using namespace std;
class Student
{public:
  void display( )
    {cout<<"num: "<<num<<endl;
     cout<<"name: "<<name<<endl;
     cout<<"sex: "<<sex<<endl;}
 private :
   int num;
   string name;
   char sex;
};   

class Student1: private Student
 {public:
   void display_1()
       {display();
       cout<<"age: "<<age<<endl;          //引用派生类的私有成员，正确
       cout<<"address: "<<addr<<endl;}    //引用派生类的私有成员，正确
  private:
       int age;
       string addr;
 };
 
int main()
 {Student1 stud1;
  stud1.display_1();
  return 0;
}

Ch11-3
#include <iostream>
#include <string>
using namespace std;
class Student                        //声明基类
{public:                             //基类公用成员                
  void display( );
 protected :                         //基类保护成员
    int num;
    string name;
    char sex;
};

void Student::display( )
   {cout<<"num: "<<num<<endl;
    cout<<"name: "<<name<<endl;
    cout<<"sex: "<<sex<<endl;
   }
   
class Student1: protected Student     //用protected继承方式声明一个派生类
{public:
   void display1( );
 private:
   int age;                          
   string addr;
};

void Student1::display1( )
    {cout<<"num: "<<num<<endl;         //引用基类的保护成员，合法
     cout<<"name: "<<name<<endl;       //引用基类的保护成员，合法
     cout<<"sex: "<<sex<<endl;         //引用基类的保护成员，合法
     cout<<"age: "<<age<<endl;         //引用派生类的私有成员，合法
     cout<<"address: "<<addr<<endl;    //引用派生类的私有成员，合法
   

int main( )
 {Student1 stud1;                      //stud2是派生类student2的对象
  stud1.display1( );                  //display是派生类中的公用成员函数
  return 0;
 }

Ch11-5
#include <iostream>
#include<string>
using namespace std;
class Student                              //声明基类
 {public:                                  //公用部分
   Student(int n,string nam,char s )       //基类构造函数
    {num=n;
     name=nam;
     sex=s; }
   ~Student( ) { }
  protected:                               //保护部分
    int num;
    string name;
    char sex ;                            //基类析构函数
};

class Student1: public Student                   //声明公用派生类student
 {public:
   Student1(int n,string nam,char s,int a,char ad[]) : Student(n,nam,s),age(a)
                                             //派生类构造函数
    {age=a;                          //在函数体中只对派生类新增的数据成员初始化
     addr=ad;
    }
   void show( )
    {cout<<"num: "<<num<<endl;
     cout<<"name: "<<name<<endl;
     cout<<"sex: "<<sex<<endl;
     cout<<"age: "<<age<<endl;
     cout<<"address: "<<addr<<endl<<endl;
    }
   ~Student1( ) { }                      //派生类析构函数
  private:                               //派生类的私有部分
   int age;                          
   string addr;                
 };
 
int main( )
 {Student1 stud1(10010,"Wang-li",'f',19,"115 Beijing Road,Shanghai");
  Student1 stud2(10011,"Zhang-fun",'m',21,"213 Shanghai Road,Beijing");
  stud1.show( );            //输出第一个学生的数据
  stud2.show( );            //输出第二个学生的数据
  return 0;
}

Ch11-6
#include <iostream>
#include <string>
using namespace std;
class Student                              //声明基类
 {public:                                  //公用部分
   Student(int n,string nam)              //基类构造函数
    {num=n;
     name=nam;
    }
   void display()                           //输出基类数据成员
    {cout<<"num:"<<num<<endl<<"name:"<<name<<endl;}
  protected:                                //保护部分
    int num;
    string name;
};

class Student1: public Student              //用public继承方式声明派生类student
 {public:
   Student1(int n,string nam,int n1,string nam1,int a,string ad)
      :Student(n,nam),monitor(n1,nam1)               //派生类构造函数
    {age=a;                                 //在此处只对派生类新增的数据成员初始化
     addr=ad;
    }
   void show( )
    {cout<<"This student is:"<<endl;
     display();                               //输出num和name
     cout<<"age: "<<age<<endl;
     cout<<"address: "<<addr<<endl<<endl;
    }
    
   void show_monitor()                        //输出子对象的数据成员
    {cout<<endl<<"Class monitor is:"<<endl;
     monitor.display();                       //调用基类成员函数
    }
   private:                                //派生类的私有数据
    Student monitor;                       //定义子对象(班长)
    int age;
    string addr;                
  };
 
int main( )
 {Student1 stud1(10010,"Wang-li",10001,"Li-sun",19,"115 Beijing Road,Shanghai");
  stud1.show( );                             //输出第一个学生的数据
  stud1.show_monitor();                       //输出子对象的数据
  return 0;
 }

Ch11-7
#include <iostream>
#include<string>
using namespace std;
class Student                              //声明基类
 {public:                                  //公用部分
   Student(int n, string nam )            //基类构造函数
    {num=n;
     name=nam;
    }
   void display()                           //输出基类数据成员
    {cout<<"num:"<<num<<endl;
     cout<<"name:"<<name<<endl;
    }
  protected:                                //保护部分
    int num;                                //基类有两个数据成员
    string name;
};

class Student1: public Student               //声明公用派生类Student1
 {public:
   Student1(int n,char nam[10],int a):Student(n,nam)        //派生类构造函数
    {age=a; }                         //在此处只对派生类新增的数据成员初始化
   void show( )                               //输出num，name和age 
    {display();                               //输出num和name
     cout<<"age: "<<age<<endl;
    }
   private:                                   //派生类的私有数据
    int age;                                  //增加一个数据成员
  };

class Student2:public Student1               //声明间接公用派生类student2
 {public:
   //下面是间接派生类构造函数
   Student2(int n, string nam,int a,int s):Student1(n,nam,a)
    {score=s;}
   void show_all()                              //输出全部数据成员
    {show();                                    //输出num和name 
     cout<<"score:"<<score<<endl;               //输出age
    }
  private:
   int score;                                   //增加一个数据成员
 };
 
int main( )
 {Student2 stud(10010,"Li",17,89);
  stud.show_all( );                            //输出学生的全部数据
return 0;
 }

Ch11-8
#include <iostream>
#include <string>
using namespace std;
class Teacher                              //声明Teacher(教师)类
 {public:                                  //公用部分
   Teacher(string nam,int a,string t)      //构造函数
    {name=nam;
     age=a;
     title=t;}
   void display()                          //输出教师有关数据
     {cout<<"name:"<<name<<endl;
      cout<<"age"<<age<<endl;
      cout<<"title:"<<title<<endl;
     }
  protected:                               //保护部分
    string name;
    int age;
    string title;                          //职称
};

class Student                              //声明类Student(学生)
 {public:
   Student(string nam,char s,float sco)
     {name1=nam;
      sex=s;
      score=sco;}                         //构造函数
   void display1()                        //输出学生有关数据
    {cout<<"name:"<<name1<<endl;
     cout<<"sex:"<<sex<<endl;
     cout<<"score:"<<score<<endl;
    }
  protected:                               //保护部分
   string name1;
   char sex;
   float score;                            //成绩
 };

class Graduate:public Teacher,public Student   //声明多重继承的派生类Graduate
 {public:
   Graduate(string nam,int a,char s,string t,float sco,float w):
        Teacher(nam,a,t),Student(nam,s,sco),wage(w) {}
   void show( )                                 //输出人员的有关数据
    {cout<<"name:"<<name<<endl;
     cout<<"age:"<<age<<endl;
     cout<<"sex:"<<sex<<endl;
     cout<<"score:"<<score<<endl;
     cout<<"title:"<<title<<endl;
     cout<<"wages:"<<wage<<endl;
     }
  private:
    float wage;                     //工资
 };
 
int main( )
 {Graduate grad1("Wang-li",24,'f',"assistant",89.5,1234.5);
  grad1.show( );
  return 0;
}

Ch11-9
#include <iostream>
#include <string>
using namespace std;
//定义公共基类Person
class Person                              
{public:
  Person(char *nam,char s,int a)            //构造函数     
   {strcpy(name,nam);sex=s;age=a;}
 protected:                                 //保护成员
   char name[20];
   char sex;
   int age;
};
//定义类Teacher
class Teacher:virtual public Person                //声明Person为公用继承的虚基类
 {public:                                 
   Teacher(char *nam,char s,int a,char *t):Person(nam,s,a)       //构造函数
    {strcpy(title,t); 
    }
  protected:                                       //保护成员
    char title[10];                                //职称
};
//定义类Student
class Student:virtual public Person               //声明Person为公用继承的虚基类
 {public:
   Student(char *nam,char s,int a,float sco):    //构造函数
      Person(nam,s,a),score(sco){}               //初始化表
  protected:                                     //保护成员
    float score;                                 //成绩
 };
//定义多重继承的派生类Graduate
class Graduate:public Teacher,public Student     //声明Teacher和Student类为公用继承的直接基类
 {public:
   Graduate(char *nam,char s,int a,char *t,float sco,float w):                  //构造函数
       Person(nam,s,a),Teacher(nam,s,a,t),Student(nam,s,a,sco),wage(w){}       //初始化表
    void show( )                                 //输出研究生的有关数据
    {cout<<"name:"<<name<<endl;
     cout<<"age:"<<age<<endl;
     cout<<"sex:"<<sex<<endl;
     cout<<"score:"<<score<<endl;
     cout<<"title:"<<title<<endl;
     cout<<"wages:"<<wage<<endl;
     }
  private:
    float wage;                     //工资
 };
 
int main( )
 {Graduate grad1("Wang-li",'f',24,"assistant",89.5,1234.5);
  grad1.show( );
  return 0;
}

第十二章

Ch12-1-1(vc)
#include <iostream.h>
//using namespace std;
//声明类Point
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};
//定义Point类的成员函数
//Point的构造函数
Point::Point(float a,float b)
{x=a;y=b;}
//设置x和y的坐标值
void Point::setPoint(float a,float b)
{x=a;y=b;}
//输出点的坐标
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}
int main()
{Point p(3.5,6.4);
 cout<<"x="<<p.getX()<<",y="<<p.getY()<<endl;
 p.setPoint(8.5,6.8);
 cout<<"p(new):"<<p<<endl;
 return 0;
}

Ch12-1-1
#include <iostream>
using namespace std;
//声明类Point
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};
//定义Point类的成员函数
//Point的构造函数
Point::Point(float a,float b)
{x=a;y=b;}
//设置x和y的坐标值
void Point::setPoint(float a,float b)
{x=a;y=b;}
//输出点的坐标
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}
int main()
{Point p(3.5,6.4);
 cout<<"x="<<p.getX()<<",y="<<p.getY()<<endl;
 p.setPoint(8.5,6.8);
 cout<<"p(new):"<<p<<endl;
 return 0;
}

Ch12-1-2(vc)
#include <iostream.h>
//using namespace std;
//声明类Point
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};
//定义Point类的成员函数
//Point的构造函数
Point::Point(float a,float b)
{x=a;y=b;}
//设置x和y的坐标值
void Point::setPoint(float a,float b)
{x=a;y=b;}
//输出点的坐标
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}

class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  float area () const;
  friend ostream &operator<<(ostream &,const Circle &);
 private:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"Center=["<<c.x<<","<<c.y<<"], Radius="<<c.radius<<", area="<<c.area()<<endl;
 return output;
}

int main()
{Circle c(3.5,6.4,5.2);
 cout<<"original circle:\nx="<<c.getX()<<", y="<<c.getY()<<", r="<<c.getRadius()
     <<", area="<<c.area()<<endl;
 c.setRadius(7.5);
 c.setPoint(5,5);
 cout<<"new circle:\n"<<c;
 Point &pRef=c;
 cout<<"pRef:"<<pRef;
 return 0;
}

Ch12-1-2
#include <iostream>
using namespace std;
//声明类Point
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};
//定义Point类的成员函数
//Point的构造函数
Point::Point(float a,float b)
{x=a;y=b;}
//设置x和y的坐标值
void Point::setPoint(float a,float b)
{x=a;y=b;}
//输出点的坐标
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}

class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  float area () const;
  friend ostream &operator<<(ostream &,const Circle &);
 private:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"Center=["<<c.x<<","<<c.y<<"], Radius="<<c.radius<<", area="<<c.area()<<endl;
 return output;
}

int main()
{Circle c(3.5,6.4,5.2);
 cout<<"original circle:\nx="<<c.getX()<<", y="<<c.getY()<<", r="<<c.getRadius()
     <<", area="<<c.area()<<endl;
 c.setRadius(7.5);
 c.setPoint(5,5);
 cout<<"new circle:\n"<<c;
 Point &pRef=c;
 cout<<"pRef:"<<pRef;
 return 0;
}

Ch12-1-3(vc)
#include <iostream.h>
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};

Point::Point(float a,float b)
{x=a;y=b;}
void Point::setPoint(float a,float b)
{x=a;y=b;}
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}

class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  float area () const;
  friend ostream &operator<<(ostream &,const Circle &);
 protected:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"Center=["<<c.x<<","<<c.y<<"], r="<<c.radius<<", area="<<c.area()<<endl;
 return output;
}

class Cylinder:public Circle
{public:
  Cylinder (float x=0,float y=0,float r=0,float h=0);
  void setHeight(float);
  float getHeight() const;
  float area() const;
  float volume() const;
  friend ostream& operator<<(ostream&,const Cylinder&);
 protected:
  float height;
};

Cylinder::Cylinder(float a,float b,float r,float h)
    :Circle(a,b,r),height(h){}

void Cylinder::setHeight(float h){height=h;}

float Cylinder::getHeight() const {return height;}

float Cylinder::area() const
{ return 2*Circle::area()+2*3.14159*radius*height;}

float Cylinder::volume() const
{return Circle::area()*height;}

ostream &operator<<(ostream &output,const Cylinder& cy)
{output<<"Center=["<<cy.x<<","<<cy.y<<"], r="<<cy.radius<<", h="<<cy.height
       <<"\narea="<<cy.area()<<", volume="<<cy.volume()<<endl;
 return output;
}

int main()
{Cylinder cy1(3.5,6.4,5.2,10);
 cout<<"\noriginal cylinder:\nx="<<cy1.getX()<<", y="<<cy1.getY()<<", r="
     <<cy1.getRadius()<<", h="<<cy1.getHeight()<<"\narea="<<cy1.area()
     <<", volume="<<cy1.volume()<<endl;
 cy1.setHeight(15);
 cy1.setRadius(7.5);
 cy1.setPoint(5,5);
 cout<<"\nnew cylinder:\n"<<cy1;
 Point &pRef=cy1;
 cout<<"\npRef as a point:"<<pRef;
 Circle &cRef=cy1;
 cout<<"\ncRef as a Circle:"<<cRef;
 return 0;
}

Ch12-1-3
#include <iostream>
using namespace std;
class Point
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};

Point::Point(float a,float b)
{x=a;y=b;}
void Point::setPoint(float a,float b)
{x=a;y=b;}
ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]"<<endl;
 return output;
}

class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  float area () const;
  friend ostream &operator<<(ostream &,const Circle &);
 protected:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"Center=["<<c.x<<","<<c.y<<"], r="<<c.radius<<", area="<<c.area()<<endl;
 return output;
}

class Cylinder:public Circle
{public:
  Cylinder (float x=0,float y=0,float r=0,float h=0);
  void setHeight(float);
  float getHeight() const;
  float area() const;
  float volume() const;
  friend ostream& operator<<(ostream&,const Cylinder&);
 protected:
  float height;
};

Cylinder::Cylinder(float a,float b,float r,float h)
    :Circle(a,b,r),height(h){}

void Cylinder::setHeight(float h){height=h;}

float Cylinder::getHeight() const {return height;}

float Cylinder::area() const
{ return 2*Circle::area()+2*3.14159*radius*height;}

float Cylinder::volume() const
{return Circle::area()*height;}

ostream &operator<<(ostream &output,const Cylinder& cy)
{output<<"Center=["<<cy.x<<","<<cy.y<<"], r="<<cy.radius<<", h="<<cy.height
       <<"\narea="<<cy.area()<<", volume="<<cy.volume()<<endl;
 return output;
}

int main()
{Cylinder cy1(3.5,6.4,5.2,10);
 cout<<"\noriginal cylinder:\nx="<<cy1.getX()<<", y="<<cy1.getY()<<", r="
     <<cy1.getRadius()<<", h="<<cy1.getHeight()<<"\narea="<<cy1.area()
     <<", volume="<<cy1.volume()<<endl;
 cy1.setHeight(15);
 cy1.setRadius(7.5);
 cy1.setPoint(5,5);
 cout<<"\nnew cylinder:\n"<<cy1;
 Point &pRef=cy1;
 cout<<"\npRef as a point:"<<pRef;
 Circle &cRef=cy1;
 cout<<"\ncRef as a Circle:"<<cRef;
 return 0;
}

Ch12-2
#include <iostream>
#include <string>
using namespace std;
class Student
 {public:
   Student(int,string,float);
   void display();
  protected:
   int num;
   string name;
   float score;
 };

Student::Student(int n,string nam,float s)
 {num=n;name=nam;score=s;}

void Student::display()
 {cout<<"num:"<<num<<"\nname:"<<name<<"\nscore:"<<score<<"\n\n";}
 
class Graduate:public Student
 {public:
   Graduate(int,string,float,float);
   void display();
  private:
   float pay;
};

void Graduate::display()
 {cout<<"num:"<<num<<"\nname:"<<name<<"\nscore:"<<score<<"\npay="<<pay<<endl;}

Graduate::Graduate(int n,string nam,float s,float p):Student(n,nam,s),pay(p){}

int main()
 {Student stud1(1001,"Li",87.5);
  Graduate grad1(2001,"Wang",98.5,563.5);
  Student *pt=&stud1;
  pt->display();
  pt=&grad1;
  pt->display();
  return 0;
 }

Ch12-2-2
#include <iostream>
#include <string>
using namespace std;
class Student
 {public:
   Student(int,string,float);
   virtual void display();
  protected:
   int num;
   string name;
   float score;
 };

Student::Student(int n,string nam,float s)
 {num=n;name=nam;score=s;}

void Student::display()
 {cout<<"num:"<<num<<"\nname:"<<name<<"\nscore:"<<score<<"\n\n";}
 
class Graduate:public Student
 {public:
   Graduate(int,string,float,float);
   void display();
 private:
  float pay;
};

void Graduate::display()
 {cout<<"num:"<<num<<"\nname:"<<name<<"\nscore:"<<score<<"\npay="<<pay<<endl;}

Graduate::Graduate(int n,string nam,float s,float p):Student(n,nam,s),pay(p){}

int main()
 {Student stud1(1001,"Li",87.5);
  Graduate grad1(2001,"Wang",98.5,1200);
  Student *pt=&stud1;
  pt->display();
  pt=&grad1;
  pt->display();
  return 0;
 }

Ch12-3
#include <iostream>
using namespace std;
class Point
{public:
  Point(){}
  ~Point(){cout<<"executing Point destructor"<<endl;}
};

class Circle:public Point
{public:
  Circle(){}
  ~Circle(){cout<<"executing Circle destructor"<<endl;}
 private:
  int radus;
};

int main()
{Point *p=new Circle;
 delete p;
 return 0;
}

Ch12-3-2
#include <iostream>
using namespace std;
class Point
{public:
  Point(){}
  virtual ~Point(){cout<<"executing Point destructor"<<endl;}
};

class Circle:public Point
{public:
  Circle(){}
  ~Circle(){cout<<"executing Circle destructor"<<endl;}
 private:
  int radus;
};

void main()
{Point *p=new Circle;
 delete p;
}

Ch12-4(vc)

#include <iostream.h>
//声明抽象基类Shape
class Shape
{public:
 virtual float area() const {return 0.0;}        //虚函数
 virtual float volume() const {return 0.0;}      //虚函数
 virtual void shapeName() const =0;              //纯虚函数
};

//声明Point类
class Point:public Shape                         //Point是Shape的公用派生类
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  virtual void shapeName() const {cout<<"Point:";}  //对纯虚函数进行定义
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};

Point::Point(float a,float b)
{x=a;y=b;}

void Point::setPoint(float a,float b)
{x=a;y=b;}

ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]";
 return output;
}

//声明Circle类
class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  virtual float area() const;
  virtual void shapeName() const {cout<<"Circle:";}         //对纯虚函数进行再定义
  friend ostream &operator<<(ostream &,const Circle &);
 protected:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"["<<c.x<<","<<c.y<<"], r="<<c.radius;
 return output;
}

//声明Cylinder类
class Cylinder:public Circle
{public:
  Cylinder (float x=0,float y=0,float r=0,float h=0);
  void setHeight(float);
  float getHeight() const;
  virtual float area() const;
  virtual float volume() const;
  virtual void shapeName() const {cout<<"Cylinder:";}         //对纯虚函数进行再定义
  friend ostream& operator<<(ostream&,const Cylinder&);
 protected:
  float height;
};

Cylinder::Cylinder(float a,float b,float r,float h)
    :Circle(a,b,r),height(h){}

void Cylinder::setHeight(float h){height=h;}

float Cylinder::getHeight() const {return height;}

float Cylinder::area() const
{ return 2*Circle::area()+2*3.14159*radius*height;}

float Cylinder::volume() const
{return Circle::area()*height;}

ostream &operator<<(ostream &output,const Cylinder& cy)
{output<<"["<<cy.x<<","<<cy.y<<"], r="<<cy.radius<<", h="<<cy.height;
 return output;
}

int main()
{Point point(3.2,4.5);                           //建立Point类对象point
 Circle circle(2.4,12,5.6);                      //建立Circle类对象circle
 Cylinder cylinder(3.5,6.4,5.2,10.5);            //建立Cylinder类对象cylinder

 point.shapeName();                              //静态关联
 cout<<point<<endl;
 
 circle.shapeName();                             //静态关联
 cout<<circle<<endl;

 cylinder.shapeName();                           //静态关联
 cout<<cylinder<<endl<<endl;

 Shape *pt;                                      //定义基类指针

 pt=&point;                                      //指针指向Point类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<point.getX()<<",y="<<point.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";

 pt=&circle;                                     //指针指向Circle类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<circle.getX()<<",y="<<circle.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";

 pt=&cylinder;                                   //指针指向Cylinder类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<cylinder.getX()<<",y="<<cylinder.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";
 return 0;
}

Ch12-4
#include <iostream>
using namespace std;
//声明抽象基类Shape
class Shape
{public:
 virtual float area() const {return 0.0;}        //虚函数
 virtual float volume() const {return 0.0;}      //虚函数
 virtual void shapeName() const =0;              //纯虚函数
};

//声明Point类
class Point:public Shape                         //Point是Shape的公用派生类
{public:
  Point(float=0,float=0);
  void setPoint(float,float);
  float getX() const {return x;}
  float getY() const {return y;}
  virtual void shapeName() const {cout<<"Point:";}  //对纯虚函数进行定义
  friend ostream & operator<<(ostream &,const Point &);
protected:
  float x,y;
};

Point::Point(float a,float b)
{x=a;y=b;}

void Point::setPoint(float a,float b)
{x=a;y=b;}

ostream & operator<<(ostream &output,const Point &p)
{output<<"["<<p.x<<","<<p.y<<"]";
 return output;
}

//声明Circle类
class Circle:public Point
{public:
  Circle(float x=0,float y=0,float r=0);
  void setRadius(float);
  float getRadius() const;
  virtual float area() const;
  virtual void shapeName() const {cout<<"Circle:";}         //对纯虚函数进行再定义
  friend ostream &operator<<(ostream &,const Circle &);
 protected:
  float radius;
};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)
{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const
{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)
{output<<"["<<c.x<<","<<c.y<<"], r="<<c.radius;
 return output;
}

//声明Cylinder类
class Cylinder:public Circle
{public:
  Cylinder (float x=0,float y=0,float r=0,float h=0);
  void setHeight(float);
  float getHeight() const;
  virtual float area() const;
  virtual float volume() const;
  virtual void shapeName() const {cout<<"Cylinder:";}         //对纯虚函数进行再定义
  friend ostream& operator<<(ostream&,const Cylinder&);
 protected:
  float height;
};

Cylinder::Cylinder(float a,float b,float r,float h)
    :Circle(a,b,r),height(h){}

void Cylinder::setHeight(float h){height=h;}

float Cylinder::getHeight() const {return height;}

float Cylinder::area() const
{ return 2*Circle::area()+2*3.14159*radius*height;}

float Cylinder::volume() const
{return Circle::area()*height;}

ostream &operator<<(ostream &output,const Cylinder& cy)
{output<<"["<<cy.x<<","<<cy.y<<"], r="<<cy.radius<<", h="<<cy.height;
 return output;
}

int main()
{Point point(3.2,4.5);                           //建立Point类对象point
 Circle circle(2.4,12,5.6);                      //建立Circle类对象circle
 Cylinder cylinder(3.5,6.4,5.2,10.5);            //建立Cylinder类对象cylinder

 point.shapeName();                              //静态关联
 cout<<point<<endl;
 
 circle.shapeName();                             //静态关联
 cout<<circle<<endl;

 cylinder.shapeName();                           //静态关联
 cout<<cylinder<<endl<<endl;

 Shape *pt;                                      //定义基类指针

 pt=&point;                                      //指针指向Point类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<point.getX()<<",y="<<point.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";

 pt=&circle;                                     //指针指向Circle类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<circle.getX()<<",y="<<circle.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";

 pt=&cylinder;                                   //指针指向Cylinder类对象
 pt->shapeName();                                //动态关联
 cout<<"x="<<cylinder.getX()<<",y="<<cylinder.getY()<<"\narea="<<pt->area()
     <<"\nvolume="<<pt->volume()<<"\n\n";
 return 0;
}

第十三章

Ch13-1
#include <iostream>
#include <math.h>
using namespace std;
int main()
{float a,b,c,disc;
 cout<<"please input a,b,c:";
 cin>>a>>b>>c;
 if (a==0)
  cerr<<"a is equal to zero,error!"<<endl;
 else
  if ((disc=b*b-4*a*c)<0)
   cerr<<"disc=b*b-4*a*c<0"<<endl;
  else
   {cout<<"x1="<<(-b+sqrt(disc))/(2*a)<<endl;
    cout<<"x2="<<(-b-sqrt(disc))/(2*a)<<endl;
   }
 return 0;
}

Ch13-2
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{int a;
 cout<<"input a:";
 cin>>a;
 cout<<"dec:"<<dec<<a<<endl;
 cout<<"hex:"<<hex<<a<<endl;
 cout<<"oct:"<<setbase(8)<<a<<endl;
 char *pt="China";
 cout<<setw(10)<<pt<<endl;
 cout<<setfill('*')<<setw(10)<<pt<<endl;
 double pi=22.0/7.0;
 cout<<setiosflags(ios::scientific)<<setprecision(8);
 cout<<"pi="<<pi<<endl;
 cout<<"pi="<<setprecision(4)<<pi<<endl;
 cout<<"pi="<<setiosflags(ios::fixed)<<pi<<endl;
 return 0;
}

Ch13-3
#include <iostream>
using namespace std;
int main()
{int a=21;
 cout.setf(ios::showbase);
 cout<<"dec:"<<a<<endl;
 cout.unsetf(ios::dec);
 cout.setf(ios::hex);
 cout<<"hex:"<<a<<endl;
 cout.unsetf(ios::hex);
 cout.setf(ios::oct);
 cout<<"oct:"<<a<<endl;
 char *pt="China";
 cout.width(10);
 cout<<pt<<endl;
 cout.width(10);
 cout.fill('*');
 cout<<pt<<endl;
 double pi=22.0/7.0;
 cout.setf(ios::scientific);
 cout<<"pi=";
 cout.width(14);
 cout<<pi<<endl;
 cout.unsetf(ios::scientific);
 cout.setf(ios::fixed);
 cout.width(12);
 cout.setf(ios::showpos);
 cout.setf(ios::internal);
 cout.precision(6);
 cout<<pi<<endl;
 return 0;
}

Ch13-4
#include <iostream>
using namespace std;
int main()
{char *a="BASIC";
 for(int i=4;i>=0;i--)
  cout.put(*(a+i));
 cout.put('\n');
 return 0;
}

Ch13-4-2
#include <iostream>
int main()
{char *a="BASIC";
 for(int i=4;i>=0;i--)
  putchar(*(a+i));
 putchar('\n');
 return 0;
}

Ch13-5
#include <iostream>
using namespace std;
int main()
{float grade;
 cout<<"enter grade:";
 while(cin>>grade)
  {if(grade>=85) cout<<grade<<" GOOD!"<<endl;
   if(grade<60) cout<<grade<<" fail!"<<endl;
   cout<<"enter grade:";
  }
 cout<<"The end."<<endl;
 return 0;
}

Ch13-6
#include <iostream>
using namespace std;
int main()
{char c;
 cout<<"enter a sentence:"<<endl;
 while((c=cin.get())!=EOF)
  cout.put(c);
 return 0;
}

Ch13-6-2
#include <iostream>
using namespace std;
int main()
{char c;
 cout<<"enter a sentence:"<<endl;
 while(cin.get(c))
  {cout.put(c);
  }
 cout<<"end"<<endl;
 return 0;
}

Ch13-6-3
#include <iostream>
using namespace std;
int main()
{char ch[20];
 cout<<"enter a sentence:"<<endl;
 cin.get(ch,10,'\n');
 cout<<ch<<endl;
 return 0;
}

Ch13-7
#include <iostream>
using namespace std;
int main()
{char ch[20];
 cout<<"enter a sentence:"<<endl;
 cin>>ch;
 cout<<"The string read with cin is:"<<ch<<endl;
 cin.getline(ch,20,'/');
 cout<<"The second part is:"<<ch<<endl;
 cin.getline(ch,20);
 cout<<"The third part is:"<<ch<<endl;
 return 0;
}

Ch13-8
#include <iostream>
using namespace std;
int main()
{char c;
 while(!cin.eof())
  if((c=cin.get())!=' ')
     cout.put(c);
 return 0;
}

Ch13-9
#include <iostream>
using namespace std;
int main()
{char c[20];
 int ch;
 cout<<"please enter a sentence."<<endl;
 cin.getline(c,15,'/');
 cout<<"The first part is:"<<c<<endl;
 ch=cin.peek();
 cout<<"The next character(ASCII code) is:"<<ch<<endl;
 cin.putback(c[0]);
 cin.getline(c,15,'/');
 cout<<"The second part is:"<<c<<endl;
 return 0;
}

Ch13-10
#include <iostream>
using namespace std;
int main()
{char ch[20];
 cin.get(ch,20,'/');
 cout<<"The first part is:"<<ch<<endl;
 cin.get(ch,20,'/');
 cout<<"The second part is:"<<ch<<endl;
 return 0;
}

Ch13-10-2
#include <iostream>
using namespace std;
int main()
{char ch[20];
 cin.get(ch,20,'/');
 cout<<"The first part is:"<<ch<<endl;
 cin.ignore();
 cin.get(ch,20,'/');
 cout<<"The second part is:"<<ch<<endl;
 return 0;
}

Ch13-11
#include <fstream>
using namespace std;
int main()
{int a[10];
 ofstream outfile("f1.dat");
 if(!outfile)
  {cerr<<"open error!"<<endl;
   exit(1);
  }
 cout<<"enter 10 integer numbers:"<<endl;
 for(int i=0;i<10;i++)
  {cin>>a[i];
   outfile<<a[i]<<" ";}
 outfile.close();
 return 0;
}

Ch13-12
#include <fstream>
using namespace std;
int main()
{int a[10],max,i,order;
 ifstream infile("f1.dat",ios::in); 
 if(!infile)
  {cerr<<"open error!"<<endl;
   exit(1);
  }
 for(i=0;i<10;i++)
   {infile>>a[i];
    cout<<a[i]<<" ";}
 cout<<endl;
 max=a[0];
 order=0;
 for(i=1;i<10;i++)
   if(a[i]>max)
     {max=a[i];
      order=i;
     }
 cout<<"max="<<max<<endl<<"order="<<order<<endl;
 infile.close();
 return 0;
}

Ch13-13
#include <fstream>
using namespace std;
void save_to_file()
{ofstream outfile("f2.dat");
 if(!outfile)
  {cerr<<"open f2.dat error!"<<endl;
   exit(1);
  }
 char c[80];
 cin.getline(c,80);
 for(int i=0;c[i];i++)
  if(c[i]>=65 && c[i]<=90||c[i]>=97 && c[i]<=122)
    {outfile.put(c[i]);
     cout<<c[i];}
 cout<<endl;
 outfile.close();
}

void get_from_file()
{char ch;
 ifstream infile("f2.dat",ios::in);
 if(!infile)
  {cerr<<"open f2.dat error!"<<endl;
   exit(1);
  }
 ofstream outfile("f3.dat");
 if(!outfile)
  {cerr<<"open f3.dat error!"<<endl;
   exit(1);
  }
 while(infile.get(ch))
  {if(ch>=97 && ch<=122)
     ch=ch-32;
   outfile.put(ch);
   cout<<ch;
  }
 cout<<endl;
 infile.close();
 outfile.close();
}
int main()
{save_to_file();
 get_from_file();
 return 0;
}

Ch13-13-2
#include <fstream>
using namespace std;
void display_file(char *filename)
{ifstream infile(filename,ios::in);
 if(!infile)
  {cerr<<"open error!"<<endl;
   exit(1);}
 char ch;
 while(infile.get(ch))
   cout.put(ch);
 cout<<endl;
 infile.close();
}
int main()
{display_file("f3.dat");
 return 0;
}

Ch13-14
#include <fstream>
using namespace std;
struct student
{char name[20];
 int num;
 int age;
 char sex;
};
int main()
{student stud[3]={"Li",1001,18,'f',"Fun",1002,19,'m',"Wang",1004,17,'f'};
 ofstream outfile("stud.dat",ios::binary);
 if(!outfile)
  {cerr<<"open error!"<<endl;
   abort();
  }
 for(int i=0;i<3;i++)
   outfile.write((char *)&stud[i],sizeof(stud[i]));
  outfile.close();
 return 0;
}

Ch13-14-2
#include <fstream>
using namespace std;
struct student
{char name[20];
 int num;
 int age;
 char sex;
};
int main()
{student stud[3]={"Li",1001,18,'f',"Fun",1002,19,'m',"Wang",1004,17,'f'};
 ofstream outfile("stud.dat",ios::binary);
 if(!outfile)
  {cerr<<"open error!"<<endl;
   abort();
  }
  outfile.write((char *)&stud[0],sizeof(stud));
  outfile.close();
  return 0;
}

Ch13-15
#include <fstream>
using namespace std;
struct student
{char name[20];
 int num;
 int age;
 char sex;
 };
int main()
{student stud[3];
 int i;
 ifstream infile("stud.dat",ios::binary);
 if(!infile)
  {cerr<<"open error!"<<endl;
   abort();
  }
  for(i=0;i<3;i++)
   infile.read((char*)&stud[i],sizeof(stud[i]));
  infile.close();
  for(i=0;i<3;i++)
   {cout<<"NO."<<i+1<<endl;
    cout<<"name:"<<stud[i].name<<endl;
    cout<<"num:"<<stud[i].num<<endl;;
    cout<<"age:"<<stud[i].age<<endl;
    cout<<"sex:"<<stud[i].sex<<endl<<endl;
   }
   return 0;
  }

Ch13-16
#include <fstream>
using namespace std;
struct student
{int num;
 char name[20];
 float score;
};
int main()
{int i;
 student stud[5]={1001,"Li",85,1002,"Fun",97.5,1004,"Wang",54,
                  1006,"Tan",76.5,1010,"ling",96};
 fstream iofile("stud.dat",ios::in|ios::out|ios::binary);
 if(!iofile)
  {cerr<<"open error!"<<endl;
   abort();
  }
 for(i=0;i<5;i++)
   iofile.write((char *)&stud[i],sizeof(stud[i]));
 student stud1[5];
 for(i=0;i<5;i=i+2)
   {iofile.seekg(i*sizeof(stud[i]),ios::beg);
    iofile.read((char *)&stud1[i/2],sizeof(stud1[i]));
    cout<<stud1[i/2].num<<" "<<stud1[i/2].name<<" "<<stud1[i/2].score<<endl;
   }
 cout<<endl;
 stud[2].num=1012;
 strcpy(stud[2].name,"Wu");
 stud[2].score=60;
 iofile.seekp(2*sizeof(stud[0]),ios::beg);
 iofile.write((char *)&stud[2],sizeof(stud[2]));
 iofile.seekg(0,ios::beg);
 for(i=0;i<5;i++)
   {iofile.read((char *)&stud[i],sizeof(stud[i]));
    cout<<stud[i].num<<" "<<stud[i].name<<" "<<stud[i].score<<endl;
   }
 iofile.close();
 return 0;
}

Ch13-17
#include <strstream>
#include <iostream>
using namespace std;
struct student
{int num;
 char name[20];
 float score;
};
int main()
{student stud[3]={1001,"Li",78,1002,"Wang",89.5,1004,"Fun",90};
 char c[50];
 ostrstream strout(c,30);
 for(int i=0;i<3;i++)
  strout<<stud[i].num<<stud[i].name<<stud[i].score;
 strout<<ends;
 cout<<"array c:"<<endl<<c<<endl;
 return 0;
}

Ch13-18
#include <strstream>
#include <iostream>
using namespace std;
int main()
{char c[50]="12 34 65 -23 -32 33 61 99 321 32";
 int a[10],i,j,t;
 cout<<"array c:"<<c<<endl;
 istrstream strin(c,sizeof(c));
 for(i=0;i<10;i++)
  strin>>a[i];
 cout<<"array a:";
 for(i=0;i<10;i++)
   cout<<a[i]<<" ";
 cout<<endl;
 for(i=0;i<9;i++)
   for(j=0;j<9-i;j++)
      if(a[j]>a[j+1])
        {t=a[j];a[j]=a[j+1];a[j+1]=t;}
 ostrstream strout(c,sizeof(c));
 for(i=0;i<10;i++)
   strout<<a[i]<<" ";
 strout<<ends;
 cout<<"array c:"<<c<<endl;
 return 0;
}

第十四章

Ch14-1-1
#include <iostream>
#include <cmath>
using namespace std;
int main()
{double triangle(double,double,double);
 double a,b,c;
 cin>>a>>b>>c;
   while(a>0 && b>0 && c>0)
    {cout<<triangle(a,b,c)<<endl;
     cin>>a>>b>>c;
    }
 return 0;
}
  
double triangle(double a,double b,double c)
{double area;
 double s=(a+b+c)/2;
 area=sqrt(s*(s-a)*(s-b)*(s-c));
 return area; 
}

Ch14-1-2
#include <iostream>
#include <cmath>
using namespace std;
int main()
{double triangle(double,double,double);
 double a,b,c;
 cin>>a>>b>>c;
 try
  {while(a>0 && b>0 && c>0)
    {cout<<triangle(a,b,c)<<endl;
     cin>>a>>b>>c;}
  }
 catch(double)
  {cout<<"a="<<a<<",b="<<b<<",c="<<c<<",that is not a traingle!"<<endl;}
 cout<<"end"<<endl;
 return 0;
}
  
double triangle(double a,double b,double c)
{double s=(a+b+c)/2;
 if (a+b<=c||b+c<=a||c+a<=b) throw a;
 return sqrt(s*(s-a)*(s-b)*(s-c));
}

Ch14-2-1
#include <iostream>
using namespace std;
int main()
{void f1();
 try
  {f1();}
 catch(double)
  {cout<<"OK0!"<<endl;}
 cout<<"end0"<<endl;
 return 0;
}
void f1()
{void f2();
 try
  {f2();}
 catch(char)
  {cout<<"OK1!";}
 cout<<"end1"<<endl;
}

void f2()
{void f3();
 try
 {f3();}
 catch(int)
 {cout<<"Ok2!"<<endl;}
 cout<<"end2"<<endl;
}
void f3()
{double a=0;
 try
  {throw a;}
 catch(float)
  {cout<<"OK3!"<<endl;}
 cout<<"end3"<<endl;
}

Ch14-2-2
#include <iostream>
using namespace std;
int main()
{void f1();
 try
  {f1();}
 catch(double)
  {cout<<"OK0!"<<endl;}
 cout<<"end0"<<endl;
 return 0;
}

void f1()
{void f2();
 try
  {f2();}
 catch(char)
  {cout<<"OK1!";}
 cout<<"end1"<<endl;
}

void f2()
{void f3();
 try
 {f3();}
 catch(int)
 {cout<<"Ok2!"<<endl;}
 cout<<"end2"<<endl;
}
void f3()
{double a=0;
 try
  {throw a;}
 catch(double)
  {cout<<"OK3!"<<endl;}
 cout<<"end3"<<endl;
}

Ch14-2-3
#include <iostream>
using namespace std;
int main()
{void f1();
 try
  {f1();}
 catch(double)
  {cout<<"OK0!"<<endl;}
 cout<<"end0"<<endl;
 return 0;
}

void f1()
{void f2();
 try
  {f2();}
 catch(char)
  {cout<<"OK1!";}
 cout<<"end1"<<endl;
}

void f2()
{void f3();
 try
 {f3();}
 catch(int)
 {cout<<"Ok2!"<<endl;}
 cout<<"end2"<<endl;
}
void f3()
{double a=0;
 try
  {throw a;}
 catch(double)
  {cout<<"OK3!"<<endl;throw;}
 cout<<"end3"<<endl;
}

Ch14-3
#include <iostream>
#include <string>
using namespace std;
class Student
 {public:
   Student(int n,string nam)
    {cout<<"construtot-"<<n<<endl;
     num=n;name=nam;}
   ~Student(){cout<<"destructor-"<<num<<endl;}
   void get_data();
  private:
   int num;
   string name;
 };
void Student::get_data()
 {if(num==0) throw num;
  else cout<<num<<" "<<name<<endl;
  cout<<"in get_data()"<<endl;
 }

void fun()
{Student stud1(1101,"tan");
 stud1.get_data();
 Student stud2(0,"Li");
 stud2.get_data();
}
int main()
{cout<<"main begin"<<endl;
 cout<<"call fun()"<<endl;
 try
  {fun();}
 catch(int n)
  {cout<<"num="<<n<<",error!"<<endl;}
 cout<<"main end"<<endl;
 return 0;
}

Ch14-4-1
#include <iostream>
using namespace std;
#include "header1.h"
int main()
 {Student stud1(101,"Wang",18);
  stud1.get_data();
  cout<<fun(5,3)<<endl;
  return 0;
 }

Ch14-4-2
#include <iostream>
using namespace std;
#include "header1.h"
#include "header2.h"
int main()
 {Student stud1(101,"Wang",18);
  stud1.get_data();
  cout<<fun(5,3)<<endl;
  return 0;
 }

Ch14-5
//main file
#include <iostream>
#include "header11.h"
#include "header22.h"
int main()
 {Ns1::Student stud1(101,"Wang",18);
  stud1.get_data();
  cout<<Ns1::fun(5,3)<<endl;
  Ns2::Student stud2(102,"Li",'f');
  stud2.get_data();
  cout<<Ns2::fun(5,3)<<endl;
  return 0;
 }
posted on 2011-10-25 21:22 1.曲待续阅读(689) 评论(0) 编辑收藏举报
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