实验任务4：
程序源码：
complex.hpp
1 #pragma once
2 #include <iostream>
3 #include <cmath>
4 using namespace std;
5 class Complex {
6 public:
7 Complex(double real = 0, double imag = 0) : real(real), imag(imag) {}
8 Complex(Complex& p) : real(p.real), imag(p.imag) {}
9 double get_real() const {
10 return real;
11 }
12 double get_imag() const {
13 return imag;
14 }
15 void show() const;
16 void add(Complex const& m);
17 friend Complex add(Complex const& m, Complex const& n);
18 friend bool is_equal(Complex const& a, Complex const& b);
19 friend double abs(Complex const& c);
20 private:
21 double real;
22 double imag;
23
24 };
25 void Complex::show() const {
26 if (imag == 0)
27 cout << real << endl;
28 else
29 cout << real << imag << 'i' << endl;
30 }
31 void Complex::add(Complex const& m) {
32 real += m.real;
33 imag += m.imag;
34 }
35 Complex add(Complex const& m, Complex const& n) {
36 Complex res;
37 res.real = m.real + n.real;
38 res.imag = m.imag + n.imag;
39 return res;
40 }
41 bool is_equal(Complex const& a, Complex const& b) {
42 if (a.real == b.real && a.imag == b.imag)
43 return true;
44 else
45 return false;
46 }
47 double abs(Complex const& c) {
48
49 return (sqrt(c.real * c.real + c.imag * c.imag));
50
51 }
task4.cpp 源码：
1 #define _CRT_SECURE_NO_WARNINGS 1
2 #include "Complex.h"
3 #include <iostream>
4
5 void test() {
6 using namespace std;
7 Complex c1(-3, -4);
8 const Complex c2(46);
9 Complex c3(c1);
10 cout << "c1 = ";
11 c1.show();
12 cout << endl;
13 cout << "c2 = ";
14 c2.show( );
15 cout << endl;
16 cout << "c2.imag = " << c2.get_imag() << endl;
17 cout << "c3 = ";
18 c3.show();
19 cout << endl;
20 cout << "abs(c1) = ";
21 cout << abs(c1) << endl;
22 cout << boolalpha;
23 cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
24 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
25 Complex c4;
26 c4 = add(c1, c2);
27 cout << "c4 = c1 + c2 = ";
28 c4.show();
29 cout << endl;
30 c1.add(c2);
31 cout << "c1 += c2, " << "c1 = ";
32 c1.show();
33 cout << endl;
34 }
35 int main() {
36 test();
37 }
运行截图：
实验任务5：
user.hpp程序源码
1 #pragma once
2 #include <iostream>
3 #include <string.h>
4 #include <iomanip>
5 using namespace std;
6
7 class User {
8 public:
9 User(string name, string password = "111111", string email = "") : name(name),
10 password(password), email(email) {
11 n++;
12 }
13 void set_email();
14 void change_passwd();
15 void print_info();
16 void print_n();
17 private:
18 string name, password, email;
19 static int n;
20 };
21 void User::set_email() {
22 cout << "ENTER YOUR EMAIL" << ":";
23 cin >> email;
24
25 }
26 void User::change_passwd() {
27 string old_passwd;
28 cout << "ENTER FORMER PASSWD:";
29 cin >> old_passwd;
30 int i = 2;
31 if (old_passwd != password) {
32
33 while (i) {
34
35 cout << "ENTER AGAIN:";
36 cin >> old_passwd;
37 if (old_passwd != password)
38 i--;
39 else
40 break;
41
42 }
43 }
44 if (i > 0)
45 {
46 cout << "ENTER NEW_PASSWD:";
47 cin >> password;
48
49 }
50
51
52
53 }
54 void User::print_info() {
55 cout << "name:" << name << endl;
56 cout << "password:" << setfill('*') << setw(password.size())<< "" << endl;
57 cout << "email:" << email << endl;
58
59 }
60 void User::print_n() {
61 cout << "total" << n << endl;
62
63 }
64 int User::n = 0;
task5.hpp程序源码
1 #define _CRT_SECURE_NO_WARNINGS 1
2 #include "User.hpp"
3 #include <iostream>
4 // 测试User类
5 void test() {
6 using std::cout;
7 using std::endl;
8 cout << "testing 1......\n";
9 User user1("Jonny", "92197", "xyz@hotmail.com");
10 user1.print_info();
11 cout << endl
12 << "testing 2......\n\n";
13 User user2("Leonard");
14 user2.change_passwd();
15 user2.set_email();
16 user2.print_info();
17 cout << endl;
18 user2.print_n();
19 }
20 int main() {
21 test();
22 }
程序运行截图
标签：const,cout,对象,void,Complex,实验,include,imag From： https://www.cnblogs.com/abcdefg-gaoyuan/p/16795985.html