实验2

#include <iostream>
using namespace std;
 struct Complex {
 double real;
 double imaginary; 
};
 int add(int , int); 
double add(double , double); 
Complex add(Complex , Complex);
 int main() {
 int i = 1 , j = 2; 
double m = 1.0 , n = 2.0;
 Complex a , b; a.imaginary = 1.0 , a.real = 1.0; 
b.imaginary = 1.0 , b.real = 1.0;
 cout<<"输入i , j"<<endl;
 cin>>i>>j;
 int k = add(i , j); 
cout<<"a + b = "<<k<<endl;
 cout<<"输入m , n"<<endl;
 cin>>m>>n;
 double s = add(m , n);
 cout<<"m + n = "<<s<<endl; 
cout<<"输入a的imaginary和real值:"<<endl; cin>>a.imaginary>>a.real;
 cout<<"输入b的imaginary和real值:"<<endl; cin>>b.imaginary>>b.real; 
// cout<<"a + b = "<<endl;
 Complex c; c = add(a , b);
 cout<<"总和的imaginary为 "<<c.imaginary<<endl;
 cout<<"总和的real为 "<<c.real<<endl;
 return 0;
 }
 int add(int i , int j) {
 int k = i + j;
 return k;
 } 
double add(double m , double n) { 
double s; s = m + n; return s; 
} 
Complex add(Complex a , Complex b) { 
Complex c; c.imaginary = a.imaginary + b.imaginary;
 c.real = a.real + b.real;
 return c; 
}

#include <iostream>
using namespace std;
void qa(int a[],int n)
{
    int i=0,j=n-1;
    int m=a[0];
    if(n<=1)
    {
                return ;

     }
while(i<j)
     {
         for(;j>i;j--){
             if(a[j]<m)
             {
                 a[i++]=a[j];
                 break;
             }
}
         for(;i<j;i++)
         {
             if(a[i]>m)
             {
                 a[j--]=a[i];
                 break;
             }
         }
     }
        a[i]=m;
        qa(a,i);
        qa(a+i+1,n-i-1);
}

#include <iostream>
using namespace std;
void qa(int a[],int n)
{
    int i=0,j=n-1;
    int m=a[0];
    if(n<=1)
    {

                return ;

     }

     while(i<j)
     {
         for(;j>i;j--)
         {
             if(a[j]<m)
             {
                 a[i++]=a[j];
                 break;
             }

         }
         for(;i<j;i++)
         {
             if(a[i]>m)
             {
                 a[j--]=a[i];
                 break;
             }

         }

     }
        a[i]=m;
        qa(a,i);
        qa(a+i+1,n-i-1);
}

int main(void)
{
    int b[10];
    int i=0;
    cout<<"输入:";
    for(i=0;i<10;i++)
    {
        cin>>b[i];
    }
        qa(b,10);
        cout<<"输出: ";
        for(i=0;i<10;i++)
           cout<<" "<<b[i];
        return 0;
}

　　运行结果

3

#include<iostream>
#include<cstring>
#include<string>
using namespace std;

class User
{
public:
    void setInfo(string name1 , string passwd1 , string email1);
    int setInfo(string name1);
    void changePasswd();
    void printInfo();
private:
    string name;
    string passwd;
    string email;
};
void User::setInfo(string name1 , string passwd1 , string email1)
{
    name.assign(name1);
    passwd.assign(passwd1);
    email.assign(email1);
}
int User::setInfo(string name1)    
{
    name.assign(name1);
    email.assign("");
    passwd.assign("111111");
    return 0;
}


void User::changePasswd()
{
    string oldpassword;
    string passwd1;
    cout<<"原密码: "<<endl;
    cin>>oldpassword;
    int n = 1;
    while(oldpassword != passwd)
    {
        if(n < 3)
        {
            int i = 3 - n;
            cout<<"错误，请重新输入密码"<<endl;
            cin>>oldpassword;
            n++;
        }
        else
        {
            cout<<"验证失败，请稍后再试，暂时退出修改密码程序"<<endl;
            return;
        }
    }
    cout<<"请输入新密码: "<<endl;
    cin>>passwd1;
    passwd.assign(passwd1);
    return;
}

void User::printInfo()
{
    cout<<"用户名: "<<name<<endl;
    cout<<"密码: "<<"******"<<endl;
    cout<<"邮箱: "<<email<<endl;
    return;
}

int main()
{
    
    User user1;
    user1.setInfo("first");
    user1.printInfo();
    user1.changePasswd();
    user1.printInfo();
    User user2;
    user2.setInfo("second" , "123456" , "126@126.com");
    user2.printInfo();
    return 0;
}

运行结果