实验一 类与对象

Complex.hpp

//Complex.hpp
#ifndef EMPLOYEE_HPP
#define EMPLOYEE_HPP

#include<iostream>
#include<cmath>


class Complex
{
private:
    double real;
    double imag;

public:
    Complex() {};
    Complex(double a)
    {
        real = a;
        imag = 0;
    }
    Complex(double b, double c)
    {
        real = b;
        imag = c;
    }
    Complex(const Complex& p)
    {
        real = p.real;
        imag = p.imag;
    }
    double get_real()const
    {
        return real;
    }
    double get_imag()const
    {
        return imag;
    }
    void show()const
    {
        if (imag < 0)
        {
            std::cout << real << imag << "i" << std::endl;
        }
        else if(imag==0)
        {
            std::cout << real << std::endl;
        }
        else
        {
            std::cout << real << "+"<<imag << "i" << std::endl;
        }
    }
    Complex add(const Complex& c)
    {
        Complex t;
        t.real = real+c.real;
        t.imag = imag+c.imag;
        return t;
    }
    friend Complex add( Complex ,const Complex );
    friend  bool is_equal(Complex &c1 ,const Complex &c2 );
    friend double abs(Complex &d);
};

Complex add(Complex c1, const Complex c2)
{
    Complex t;
    t.real = c1.real + c2.real;
    t.imag = c1.imag + c2.imag;
    return t;
}

bool is_equal(Complex &c1, const Complex &c2)
{
    if (c1.real == c2.real && c1.imag == c2.imag)
    {
        return true;
    }
    else 
    {
        return false;
    }
}

double abs(Complex& d)
{
    return sqrt(d.real * d.real + d.imag * d.imag);
}
#endif

Task3.cpp

//task3.cpp
#include "Complex.hpp"
#include<iostream>


int main()
{
    using namespace std;

    Complex c1(3, -4);
    const Complex c2(4.5);
    Complex c3(c1);

    cout << "c1=";
    c1.show();
    cout << endl;

    cout << "c2=";
    c2.show();
    cout << endl;
    cout << "c2.imag=" << c2.get_imag() << endl;

    cout << "c3 = "; 
    c3.show();
    cout << endl;

    cout << "abs(c1)=";
    std::cout << abs(c1) << endl;

    cout << boolalpha;
    cout << "c1==c3:" << is_equal(c1, c3) << endl;
    cout << "c1==c2:" << is_equal(c1, c2) << endl;

    Complex c4;
    c4 = add(c1, c2);
    cout << "c4=c1+c2=";
    c4.show();
    cout << endl;

    c1=c1.add(c2);
    cout << "c1+=c2," << "c1=";
    c1.show();
    cout << endl;

}

 

Task3.cpp

//task3.cpp 
//另一组数据处理
#include "Complex.hpp"
#include<iostream>


int main()
{
    using namespace std;

    Complex c1(6, 8);
    const Complex c2(3);
    Complex c3(c1);

    cout << "c1=";
    c1.show();
    cout << endl;

    cout << "c2=";
    c2.show();
    cout << endl;
    cout << "c2.imag=" << c2.get_imag() << endl;

    cout << "c3 = "; 
    c3.show();
    cout << endl;

    cout << "abs(c1)=";
    std::cout << abs(c1) << endl;

    cout << boolalpha;
    cout << "c1==c3:" << is_equal(c1, c3) << endl;
    cout << "c1==c2:" << is_equal(c1, c2) << endl;

    Complex c4;
    c4 = add(c1, c2);
    cout << "c4=c1+c2=";
    c4.show();
    cout << endl;

    c1=c1.add(c2);
    cout << "c1+=c2," << "c1=";
    c1.show();
    cout << endl;

}

 User.hpp

//User.hpp
#ifndef EMPLOYEE_HPP
#define EMPLOYEE_HPP


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

class User
{
private:
    string name;
    string password;
    string email;
    static int n;
public:
    User(string name0) :name{ name0 }, password{"111111"}, email{""}
    {
        ++n;
    }
    User(string name0, string password0, string email0):name{name0},password{password0},email{email0}
    {
        ++n;
    }
    void set_email()
    {
        cout << "请输入你的邮箱地址：";
        cin >> email;
        cout << "邮箱设置成功..." << endl;
    }
    void change_passwd()
    {
        string oldpassword;
        int i = 1;
        cout << "请输入旧密码：";
        cin >> oldpassword;
        while (oldpassword != password && i <3)
        {
            cout << "密码错误，请重试:";
            cin >> oldpassword;
            i++;
        }
        if (oldpassword != password && i == 3)
        {
            cout << "输入错误，请稍后重试." << endl;
        }
        if (oldpassword == password)
        {
            cout << "输入成功，请修改你的密码:";
            cin >> password;
            cout << "已成功设置新密码." << endl;

        }
    }
    void print_info()
    {
        cout << "用户名：" << name << endl;
        cout << "密码：" << "******" << endl;
        cout << "联系邮箱：" << email << endl;
    }
    static void print_n();
};

int User::n = 0;
void User::print_n()
{
    cout << "这里一共有"<<n<<"名用户" << endl;
}

#endif

Task4.cpp

//task4.cpp
#include "User.hpp"
#include <iostream>
int main()
{
    using namespace std;
    cout << "testing 1......" << endl;
    User user1("Jonny", "92197", "xyz@hotmail.com");
    user1.print_info();
    cout << endl
        << "testing 2......" << endl
        << endl;
    User user2("Leonard");
    user2.change_passwd();
    user2.set_email();
    user2.print_info();
    User::print_n();
}