第二次实验

实验任务四

Complex.hpp 源代码

#pragma once


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

class Complex
{
public:
    Complex();
    Complex(double x);
    Complex(double x, double y);
    Complex(Complex& other);
    friend Complex add(const Complex &c1, const Complex &c2);
    Complex add(const Complex& other);
     friend bool is_equal(const Complex &c1,const Complex &c2);
    friend double abs(const Complex &c1);
    double get_real() const
    {
        return x;
    }
    double get_imag() const
    {
        return y;
    }
    void show() const
    {
        if (y > 0)
        {
            cout << x << "+" << y << "i";
        }
        if (y == 0)
        {
            cout << x;
        }
        if (y < 0)
        {
            cout << x << y << "i";
        }
    }
private:
    double x, y;
};
Complex::Complex()
{
    x = 0;
    y = 0;
}
Complex::Complex(double x)
{
    this->x = x;
    y = 0;
}
Complex::Complex(double x,double y)
{
    this->x = x;
    this->y = y;

}
Complex::Complex(Complex& other)
{
    this->x = other.x;
    this->y = other.y;
}
Complex add(const Complex &c1, const Complex &c2) 
{
    Complex c3;
    c3.x = c1.x + c2.x;
    c3.y = c2.y + c1.y;
    return c3;
}
bool is_equal(const Complex &c1,const Complex &c2)
{
    if (c1.x == c2.x && c2.y == c1.y)
    {
        return true;
    }
    return false;
}
double abs(const Complex &c1)
{
    double s;
    s = sqrt(c1.x * c1.x + c1.y * c1.y);
    return s;
}
Complex Complex::add(const Complex& other)
{
    this->x += other.x;
    this->y += other.y;
    return *this;
}

Complex.cpp源代码

#include "Complex.hpp"
#include <iostream>

// 类测试
void test() {
    using namespace std;

    Complex c1(2, 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) = ";
    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.add(c2);
    cout << "c1 += c2, " << "c1 = ";
    c1.show();
    cout << endl;
}

int main() {
    test();
}

 

 

 实验任务五

User.hpp源代码

#pragma once

#include<iostream>
#include<string>
using namespace std;
    
class User
{

public:
    User(string name);
    User(string name, string password, string email);
    void set_email();
    void change_passwd();
    void print_info();
     static int print_n();
private:
    string name, password, email;
  static int count;
};
int User::count = 0;
User::User(string name)
{
    this->name = name;
    this->password = "111111";
    this->email = ' ';
    count ++ ;
    
}

User::User(string name, string password, string email)
{
    this->name = name;
    this->password = password;
    this->email = email;
    count++;
}

void User::set_email()
{
    cout << "enter email address:";
    cin >> email;
    cout << "email is set successfully..." << endl;

}

void User::change_passwd()
{
    cout << "Enter old password:";
    string s1;
    int count = 3;
    while (count)
    {
        cin >> s1;
        if (s1 != password)
        {
            if (count != 1)
                cout << "password input error.Please re-enter again:" << endl;
            else
                cout << "password input error.Please try after a while." << endl;
        }
        else
        {
            cout << "Enter new password:";
            cin >> password;
            cout << "new password id set successfully..." << endl;
            break;
        }
        count--;
    }
    
}
void User::print_info()
{
    string s1(password.length(), '*');
    cout << "name:" << name << endl;
    cout << "password:" << s1 << endl;
    cout << "email:" << email << endl;

}
int User::print_n()
{
    
    cout << "there are  "<<count<<"  users." << endl;
    return count;
}

 

User.cpp源代码

#include "User.hpp"
#include <iostream>

// 测试User类
void test() {
    using std::cout;
    using std::endl;

    cout << "testing 1......\n";
    User user1("Jonny", "92197", "xyz@hotmail.com");
    user1.print_info();

    cout << endl
        << "testing 2......\n\n";

    User user2("Leonard");
    user2.change_passwd();
    user2.set_email();
    user2.print_info();

    cout << endl;
    User::print_n();
}

int main() {
    test();
}