实验二

实验任务4

Complex.hpp文件源码：

#include<iostream>
#include<math.h>
using namespace std;
class Complex {
public:
    Complex(double r=0.0,double i=0.0) :real(r), imag(i) {    }
    Complex( Complex& t) :real(t.real), imag(t.imag) {    }
    double get_real()const {
        return real;
    };
    double get_imag()const {
        return imag;
    };
    void show()const {
        cout << real;
        if (imag >0)
            cout <<  "+" << imag << "i";
        else if(imag<0)
            cout << imag<<"i";
    };
    void add(const Complex& c) {
        real += c.real;
        imag += c.imag;
    }
    friend Complex add(const Complex &c1,const Complex &c2) {
        Complex c3;
        c3.real = c1.real + c2.real;
        c3.imag = c1.imag + c2.imag;
        return c3;
    };
    friend bool is_equal(const Complex &c1,const Complex &c2) {
        if (c1.real == c2.real && c1.imag == c2.imag)
            return true;
        else
            return false;
    };
    friend double abs(const Complex c) {
        double l;
        l = sqrt(c.real*c.real+c.imag*c.imag);
        return l;
    };
private:
    double real, imag;
};

 

task4.cpp源码：

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

// 类测试
void test() {
    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;
}

int main() {
    test();
}

运行测试结果截图：

更换数据后运行结果：

实验任务5

User.hpp文件源码:

#include<iostream>
using namespace std;
class User {
public:
    User(string na, string p = "111111", string e="000000");
    void set_email() {
        cout << "Enter email address:";
    cin >> email;
    cout << " email is set successfully..." << endl;
    }
    void change_passwd();
    void print_info()const;
    void static print_n();
private:
    string name ;
    string passwd;
    string email;
    static int n;
};
int User::n = 0;
User::User(string na, string p, string e) :name(na), passwd(p), email(e) { n++; };
void User:: print_n() {
    cout << "there are" << n << "users.";
}
void User::change_passwd() {
    string old = passwd;
    int count=0;
    cout << "Enter old password:";
    cin >> passwd;
    count ++;
    while (passwd != old&&count<3) {
        cout << "password inout error.Please re-enter again:";
        cin >> passwd;
        count++;
    }
    if (count == 3) {
        cout << "password inout error.Please try after a while" << endl;
    }
    if (count != 3) {
        cout << "Enter new passwd:";
        cin >> passwd;
        cout << "new password is set successfully..." << endl;
    }
}
void User::print_info() const{
    cout << "name:" << name << endl;
    int l;
    l= size(passwd);
    cout << "passwd:";
    while (l--) {
        cout << "*";
    }
    cout << endl;
    cout << "email:" << email << endl;
    }

task5.cpp源码 :

#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("Marry");
    user2.change_passwd();
    user2.set_email();
    user2.print_info();

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

int main() {
    test();
}

 

测试一截图：

 

测试二截图：

更换用户信息数据后测试：