实验一

complex.h

#include "complex.h"
#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) = ";
    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;
}

complex.cpp

//类的实现
#include "complex.h"
#include<iostream>
#include<math.h>
using namespace std;
complex::complex(double a) :real(a), imag(0) {}
complex::complex(double a, double b) : real(a), imag(b) {}
complex::complex() : real(0), imag(0) {}
complex::complex(complex& c){
    real = c.real;
    imag = c.imag;
}
void complex::show(){
    if (imag > 0){
        cout << real << '+' << imag << 'i';
    }else if (imag < 0){
        cout << real << imag << 'i';
    }else { cout << real; }
}
void complex::show() const{
    if (imag > 0)cout << real << '+' << imag << 'i';
    else if (imag < 0)cout << real << imag << 'i';
    else { cout << real; }
}
void complex::add(const complex& d){
    real = real + d.real;
    imag = imag + d.imag;
}
complex add(complex& c1, const complex& c2){
    complex cc;
    cc.real = c1.real + c2.real;
    cc.imag = c1.imag + c2.imag;
    return cc;
}
bool is_equal(complex& c3, complex& c4){
    if ((c3.real == c4.real) && (c3.imag == c4.imag))
    {
        return true;
    }
    else
    {
        return false;
    }
}
bool is_equal(complex& c3, const complex& c4){
    if ((c3.real == c4.real) && (c3.imag == c4.imag)){
        return true;
    }
    else{
        return false;
    }
}
double abs(complex& c5){
    return sqrt(c5.real * c5.real + c5.imag * c5.imag);
}

task3

#include "complex.h"
#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) = ";
    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;
}

 

user.h

#pragma once
#include<iostream>
using namespace std;
class User
{
public:
    User(string a, string b="1111111", string c="") :name(a), passwd(b), email(c) { n++; }
     void set_email();
     void change_passwd();
     void print_info();
     static void print_n();
private:
    string name, passwd, email;
    static int n;
};

user.cpp

#include<iostream>
#include <string>
#include"user.h"
using namespace std;
int User::n = 0;
void User::set_email(){
    string s;
    cout << "请输入邮箱" << endl;
    cin >> s;
    email = s;
}
void User::change_passwd(){
    int n = 3;
    while (n--){
        cout << "请输入旧密码" << endl;
        string s;
        cin >> s;
        if (s == passwd){
            string t;
            cin >> t;
            email = t;
            break;
        }
    }
}
void User::print_info(){
    cout << name << email << "******";
}
void User::print_n(){
    cout<<n<<endl;
}

task4

#include "user.h"
#include <iostream>
void in()
{
    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();
}