实验一

task3：

#ifndef Complex_HPP
#define Complex_HPP

#include <iostream>
#include <iomanip>
#include <string>
#include<cmath>

using namespace std;

class Complex
{
public:
    Complex(double x = 0, double y = 0) :real{ x }, imag{ y }{}
    Complex(const Complex& c0) :real{ c0.real }, imag(c0.imag){}
    double get_real() { return real; }
    double get_imag()const { return imag; }
    void show()const;
    void add(Complex c1);
    friend Complex add(const Complex& c2,const Complex& c3);
    friend bool is_equal(Complex c4, Complex c5);
    friend double abs(Complex c6);
private:
    double real;
    double imag;
};
void Complex::show()const {
    if (imag < 0) {
        cout << real << imag << "i" ;
    }
    else if (imag == 0) {
        cout << real;
    }
    else
        cout << real << "+" << imag << "i";
}
void Complex::add(Complex c1) {
    real += c1.real;
    imag += c1.imag;
}
Complex add(const Complex& c2,const Complex& c3) {
    Complex ch;
    ch.real = c2.real + c3.real;
    ch.imag = c2.imag + c3.imag;
    return ch;
}
bool is_equal(Complex c4, Complex c5) {
    if (c4.real == c5.real && c4.imag == c5.imag) {
        return 1;
    }
    else
        return 0;
}
double abs(Complex c6) {
    return static_cast<double>(sqrt(c6.real * c6.real + c6.imag * c6.imag));
}






#endif

cpp

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

int main()
{
    using namespace std;

    Complex c1(5, -12);
    const Complex c2(7.3);
    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) = ";
    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;
}

 

 task 4:

#ifndef User_HPP
#define User_HPP
#include <iostream>
#include <iomanip>
#include <string>

using namespace std;


class User
{
public:
    User(string name0, string passwd0 = "111111", string email0 = "") :name{ name0 }, passwd{ passwd0 }, email{ email0 }{++n; }
    void set_email();
    void change_passwd();
    void print_info()const;
    static void print_n();
private:
    string name;
    string passwd;
    string email;
    static int n;
};

int User::n = 0;
void User::set_email() {
    string skt;
    cout << "Enter email address:";
    cin >> skt;
    email = skt;
    cout << "email is set successfully..." << endl;
}
void User::print_info()const{
    cout << "name:\t" << name << endl;
    cout << "passwd:\t" << "******" << endl;
    cout << "email:\t" << email << endl;
}
void User::print_n() {
    if (n == 1)
        cout << "there are " << n << " user\n";
    else
        cout << "there are " << n << " users\n";
}
void User::change_passwd() {
    string rox;
    cout << "Enter old password: ";
    cin >> rox;
    if (rox != passwd) {
        cout << "password input error.Please re-enter again: ";
        string rox1;
        cin >> rox1;
        if (rox1 != passwd) {
            cout << "password input error.Please re-enter again: ";
            string rox2;
            cin >> rox2;
            if (rox2 != passwd) {
                cout << "password input error.Please try after a while." << endl;
            }
            else {
                string rox5;
                cout << "Enter new password: ";
                cin >> rox5;
                passwd = rox5;
                cout << "new passwd is set successfully..." << endl;
            }
        }
        else {
            string rox4;
            cout << "Enter new password: ";
            cin >> rox4;
            passwd = rox4;
            cout << "new passwd is set successfully..." << endl;
        }
    }
    else {
        string rox3;
        cout << "Enter new password: ";
        cin >> rox3;
        passwd = rox3;
        cout << "new passwd is set successfully..." << endl;
    }
}
#endif

cpp

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

int main()
{
    using namespace std;

    cout << "testing 1......" << endl;
    User user1("Jonny", "92197", "shadoubuhui@.com");
    user1.print_info();

    cout << endl
        << "testing 2......" << endl
        << endl;
    User user2("Liyundi");
    user2.change_passwd();
    user2.set_email();
    user2.print_info();
    User user3("leshi", "666666");
    user3.change_passwd();
    user3.set_email();
    user3.print_info();
    User::print_n();
}

 

标签：const,cout,passwd,imag,Complex,实验,include
来源： https://www.cnblogs.com/AJ1013/p/15449670.html