cpp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 a, double b)
{
    return a + b;
}
Complex add(Complex a, Complex b)
{
    Complex i;
    i.real = a.real + b.real;
    i.imaginary = a.imaginary + b.imaginary;
    return i;
};
int main() {
    int m, n;
    cout << "Enter two integer:";
    cin >> m >> n;
    cout << "Their sum:" << add(m, n) << endl;

    double x, y;
    cout << "Enter two real number:";
    cin >> x >> y;
    cout << "Their sum:" << add(x, y) << endl;

    Complex a, b, c;
    cout << "Enter two complex unmber:";
    cin >> a.real >> a.imaginary;
    cin >> b.real >> b.imaginary;
    c = add(a, b);
    cout << "Their sum:" << c.real << "+" << c.imaginary << "i" << endl;
    return 0;
}

#include<iostream>
using namespace std;
void QS(int a[], int, int);
int main()
{
    int a[] = { 132,23,56,818,648,65,21,35,64,8 }, k;
    int n = 10;
    cout << "Before sort:" << endl;
    for (k = 0; k < n; k++)
        cout << a[k] << ",";
    cout << endl;
    QS(a, 0, n - 1);
    cout << "After sort:" << endl;
    for (k = 0; k < n; k++)
        cout << a[k] << ",";
    cout << endl;
    return 0;
}

void QS(int s[], int left, int right)
{
    if (left < right)
    {
        int i = left, j = right, x = s[left];//取出数组中第一个数
        while (i < j)
        {
            while (i < j && s[j] >= x) // 从右侧找第一个小于x的数
                j--;
            if (i < j)
                s[i++] = s[j];
            while (i < j && s[i] < x) // 从左侧找第一个大于等于x的数
                i++;
            if (i < j)
                s[j--] = s[i];
        }
        s[i] = x;
        QS(s, left, i - 1); // 数组中的数依次排序
        QS(s, i + 1, right);
    }
}

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

// User类的声明 
class User {
public:
    User() :name(""), passwd(""), email("") {};
    
    void setInfo(string name, string password = "111111", string email = "");

    //×××(补足代码) 
    // 声明带有默认形参值的成员函数setInfo()        
    // 密码默认值为6个1                             
    // 邮箱默认值为空串         
    void changePasswd();
    void printInfo();
private:
    string name;
    string passwd;
    string email;
};
// User类的实现
void User::setInfo(string name0, string password0, string email0)
{
    name = name0;
    passwd = password0;
    email = email0;
}
// 成员函数setInfo()的实现 
void User::changePasswd()
{
    int count = 1;
    string passwd1;
    string newpasswd;
    cout << "the old password：";
    cin >> passwd1;
    while (passwd1 != "111111"&&count <=

 3)
    {
        count++;
        cout << "请重新输入";
        cin >> passwd1;
    }
    if (count > 3)
    {
        cout << "plesae try later" << endl;
    }
    else
    {
        
        cout << "Enter new password:"<<newpasswd;
        cin >> newpasswd;
        cout << "the password is changed successfully" << endl;
        passwd = newpasswd;
    }
}// 功能：设置用户名(name), 密码(passwd), 联系邮箱(email) 
// 成员函数changePasswd()的实现 
// 功能：修改密码 
// 要求：在修改密码前，要求先输入旧密码，验证无误后，才允许修改。 
// 如果输入旧密码时，连续三次输入错误，则提示用户稍后再试，暂时退出修改密码程序。 
// 补足代码 
void User::printInfo()
{
    cout << "name: " << name << endl;
    cout << "password: " << "******" << endl;
    cout << "email: " << email << endl;
}

// 成员函数printInfo()的实现 
// 功能：打印用户信息 
// 要求： 密码以6个*显示 
// 补足代码 
// ×××基础实现版预期运行结果截图：（实际编写后，请修改main()中对象实例测试）


// 在主函数中测试User类 
// 用User类创建对象，测试类的功能 
int main() {
    cout << "testing 1......" << endl;
    // 测试1    
    User user1;
    user1.setInfo("Leonard");
    user1.printInfo();
    user1.changePasswd();
    user1.printInfo();

    cout << endl << "testing 2......" << endl << endl;
    // 测试2     
    User user2;
    user2.setInfo("Jonny", "92197", "xyz@hotmail.com");
    user2.printInfo();
    return 0;
}