实验二

#include <iostream>
using namespace std;
struct complex{
    double real;
    double imaginary;
}; 

int add(int a,int b) {
    return a+b;
}

double add(double x,double y) {
    return x+y;
}

complex add(complex m,complex n) {
    complex z;
    z.real=m.real+n.real;
    z.imaginary=m.imaginary+n.imaginary;
    return z;
}

int main() {
    int a,b;
    cout<<"输入两个整数:";
    cin>>a>>b;
    cout<<"两数之和:"<<add(a,b)<<endl;
    double x,y;
    cout<<"输入两个双精度型的数:";
    cin>>x>>y;
    cout<<"两数之和:"<<add(x,y)<<endl;
    complex m,n,z;
    cout<<"输入两个复数:";
    cin>>m.real>>m.imaginary>>n.real>>n.imaginary;
    z=add(m,n);
    cout<<z.real<<"+"<<z.imaginary<<"i"<<endl;
    return 0;
}

#ifndef Quicksort
#define Quicksort
template <class T>
void QSort(T a[], int low, int high) {
    int i(low),j(high-1),k(0);
    T b, c;
    b = s[(low+high)/2];
    if (i < j) {
    while (i < j) {
        while (i < j&&b < a[j])
            j--;
        while (i < j&&b > a[i])
            i++;
        if (i >= j) k = j;
        else { c = a[i]; a[i] = a[j]; a[j] = c; }
    }
        QSort(a, low, k);
        QSort(a, k + 1, high);
    }
}
#endif
#include <iostream>
#include "QSort.h"
#include <iomanip>
using namespace std;
int main() {
    int i;
    int a[5]={12,29,19,119,90};
    double b[5]={2.3,7.9,12.0,6.8,12.9};
    QSort(a,0,5);
    for(i=0;i<5;i++)
        cout<<a[i]<<endl;
    QSort(b,0,5);
    for(i=0;i<5;i++)
        cout<<b[i]<<endl;
    return 0;
}

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

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

void User::setInfo(string name1,string passwd1,string email1) {
    name=name1;
    passwd=passwd1;
    email=email1;
}

void User::changePasswd() {
    string oldpasswd;
    int i=1;
    cout<<"input oldpasswd:";
    cin>>oldpasswd;
    while(oldpasswd!=passwd&&i<3) {
        cout<<"It‘s wrong,try again.";
        cin>>oldpasswd;
        i++;
    }
    if(oldpasswd!=passwd&&i==3)
       cout<<"Please try it later.";
    if(oldpasswd==passwd) {
        cout<<"change your passwd:";
        cin>>passwd;
    }
}

void User::printInfo() {
    cout<<"name:"<<name<<endl;
    cout<<"passwd:******"<<endl;
    cout<<"email:"<<email<<endl;
}

int main() {
    cout<<"testing 1......"<<endl;
    User user1;
    user1.setInfo("Leonard");
    user1.printInfo();
    user1.changePasswd();
    user1.printInfo();
    
    cout<<endl<<"testing 2......"<<endl<<endl;
    User user2;
    user2.setInfo("Jonny","92197","xyz@hotmail.com");
    user2.printInfo();
    
    return 0; 
}