c++实验一
2-28(1)
#include <iostream>
using namespace std;
int main()
{char a;
while(1)
{cout<<"Menu:A(dd) D(elete) S(ort) Q(uit),Select one:";
cin>>a;
if(a=='A')
{cout<<"数据已经增加."<<endl;
continue;
}
else if(a=='D')
{cout<<"数据已经删除."<<endl;
continue;
}
else if(a=='S')
{cout<<"数据已经排序."<<endl;
continue;
}
else if(a=='Q')
{ cout<<"程序结束";
break;
}
return 0;
}
}
2-28(2)
#include <iostream>
using namespace std;
int main() {
char a;
while(true)
{cout<<"Menu:A(dd)D(elete)S(ort)Q(uit),Select one:"<<endl;
cin>>a;
switch (a)
{case 'A':{cout<<"数据已经增加"<<endl;continue;}
case 'D':{cout<<"数据已经减少"<<endl;continue;}
case 'S':{cout<<"数据已经排序"<<endl;continue;}
case 'Q':break;
default:{cout<<"程序结束"<<endl;continue;}
}
break;
}
return 0;
}
截图:
2-29(1)
#include <iostream>
using namespace std;
int main()
{int i=2,j,x,y;
while(i<101)
{x=1;
y=i/2;
j=2;
while(j<=y)
{if(i%j==0)
{x=0;
break;
}
j++;
}
if(x)
cout<<i<<" ";
i++;
}
}
2-29(2)
#include<iostream> using namespace std; int main() { int a=2,n=1,i=2; do { if(a%i==0&&i!=a) { a++; continue; } else if(i==a) { cout<<a++; if(n%5==0) cout<<endl; else cout<<" "; n++; i=2; } else i++; }while(a<101); return 0;
2-29(3)
#include<iostream> using namespace std; int main() { int i,j,n=1; for(i=2;i<=100;i++) for(j=2;j<=i;j++) { if(i%j==0&&i!=j) break; if(i==j) { cout<<i; if(n%5==0) cout<<endl; else cout<<" "; n++; } } return 0; }
截图:
2-32(1)
#include <iostream> using namespace std; int main() { int n=70,m; cout<<"please guess the nunmber(1-100): ";cin>>m; while(n!=m) {if(m<n) {cout<<"bigger than the number: ";cin>>m;} else {cout<<"smaller than the number: ";cin>>m;} } cout<<"right!"<<endl; return 0; }
2-32(2)
#include <iostream> using namespace std; int main() { int n=70,m; cout<<"please guess the nunmber(1-100): ";cin>>m; do {if(m<n) {cout<<"bigger than the number: ";cin>>m;} else {cout<<"smaller than the number: ";cin>>m;} }while(n!=m); cout<<"right!"<<endl; return 0; }
截图:
2-34
#include<iostream>
#include<iomanip>
using namespace std;
void qiu(int a)
{
switch(a)
{
case 1:cout<<"red ";break;
case 2:cout<<"yellow ";break;
case 3:cout<<"biue ";break;
case 4:cout<<"white ";break;
case 5:cout<<"black ";break;
}
}
int main()
{
int i,j,k,n=0;
for(i=1;i<=5;i++)
{
for(j=i+1;j<=5;j++)
{
for(k=j+1;k<=5;k++)
{
qiu(i);
qiu(j);
qiu(k);
cout<<endl;
n++;
}
}
}
cout<<"number:"<<n<<endl;
return 0;
}
截图:
总结:上学期学的不够精,导致用起来十分生硬,虽然C++和c差不多,但一个寒假没用也确实忘了许多。这章重温了循环等操作,还得多加练习
https://www.cnblogs.com/lszz/p/10527444.html#4213050
https://www.cnblogs.com/lszz/p/10527444.html#4213050
https://www.cnblogs.com/KOKODA/p/10512049.html#4213043