第二次实验

#include<iostream>
using namespace std;
struct complex{
    double real;
    double imaginary;
};
int myadd(int,int);
double myadd(double,double);
complex myadd(complex,complex);
int main()
{
    int a=1,b=2;
    double c=1.1,d=5.5;
    complex e={1.1,2},f={3.3,4.4},j;
    cout<<myadd(a,b)<<endl;
    cout<<myadd(c,d)<<endl;
    j=myadd(e,f);
    cout<<j.real<<"+"<<j.imaginary<<"i"<<endl;
    return 0;
}

int myadd(int x,int y)
{
    return x+y;
}
double myadd(double x,double y)
{
    return x+y;
}
complex myadd(complex x,complex y)
{
    complex i;
    i.real=x.real+y.real;
    i.imaginary=x.imaginary+y.imaginary;
    return i;
}

重载函数比较简单，理解也不是太困难，故写的也比较简单。

#include<iostream>
using namespace std;
void fastpx(int a[],int high,int low);
int main()
{
	int s[10]={55,22,14,36,98,54,40,98,82,2},i;
	fastpx(s,9,0);
	for(i=0;i<10;i++)
	{
		cout<<s[i]<<" ";
	}
	cout<<endl;
	return 0;
}

void fastpx(int a[],int high,int low)
{
	if(high-low<=0)
		return ;
	int b=a[low],i=high,j=low,k=i,c=low;
	while(i!=j)
	{
		if(k==i)
		{
			if(b<a[i])
			{
				i--;
				k=i;
			}
			else
			{
				k=j;
				a[c]=a[i];
				c=i;
				a[c]=b;
				i--;
			}
		}
		else if(k==j)
		{
			if(b>a[j])
			{
				j++;
				k=j;
			}
			else
			{
				k=i;
				a[c]=a[j];
				c=j;
				a[c]=b;
				j++;
			}
		}
	}
	if(a[j-1]==b)
	{
		if(a[j-1]>a[j])
		{
			k=a[j];
			a[j]=a[j-1];
			a[j-1]=k;
			c=j;
		}
	}
    if(a[i+1]==b)
	{
		if(a[i+1]<a[i])
		{
			k=a[i];
			a[i]=a[i+1];
			a[i+1]=k;
			c=i;
		}
	}
	fastpx(a,c-1,low);
	fastpx(a,high,c+1);	
}

　　

 

快速排序理解还可以，但是不能和老师讲的同步，只能写成这样，然后后期经常出错，这是调试好多次后的结果。

#include<iostream>
#include<string>

using namespace std;

class user{
public:
	void setInfo(string xingming,string mima="111111",string youjian=" ");
	void printInfo();
	void changePasswd();
private:
	string name;
	string passwd;
	string email;
};
void user::setInfo(string xingming,string mima,string youjian)
{
	name=xingming;
	passwd=mima;
	email=youjian;
}
void user::printInfo()
{
	cout<<"用户名:"<<name<<endl;
    cout<<"密码:"<<"******"<<endl;
    cout<<"邮箱:"<<email<<endl;
}
void user::changePasswd()
{
	cout<<"请输入密码："<<endl;
	string m;
	cin>>m;
	if(m==passwd)
	{
		cout<<"请输入新密码"<<endl;
		cin>>passwd;
	}
	else
	{
		cout<<"密码不正确，请重新输入:"<<endl;
		cin>>m;
        if(m==passwd)
		{
     		cout<<"请输入新密码"<<endl;
    		cin>>passwd;
		}
    	else
		{
    		cout<<"密码不正确，请重新输入:"<<endl;
     		cin>>m;
            if(m==passwd)
			{
	        	cout<<"请输入新密码"<<endl;
	        	cin>>passwd;
			}
        	else
			{
	        	cout<<"密码不正确，请稍后再输入:"<<endl;
			}
		}
	}
}
int main()
{
	user user1;
	user1.setInfo("miaoxinyu","13852039350laoshi","17996548@qq.com");
	user1.printInfo();
	user1.changePasswd();

	return 0;
}

　　

 

对类的理解不太深，这是和同学讨论后的结果，以后要多加复习。