实验二 类与对象

实验4

不使用C++标准库，自行设计并实现一个简化版复数类Complex.

 1 #pragma once
 2 #include<bits/stdc++.h>
 3 using namespace std;
 4 class Complex
 5 {
 6 public:
 7     Complex(double a=0, double b=0) :real{ a }, imag{ b }{};
 8     Complex(const Complex& c) :real{ c.real }, imag{ c.imag }{};
 9     double get_real()const { return real; }
10     double get_imag()const { return imag; }
11     void show()const;
12     void add(const Complex& c);
13     friend Complex add(const Complex& c1, const Complex& c2);
14     friend bool is_equal(const Complex& c1, const Complex& c2);
15     friend double abs(Complex& c);
16 private:
17     double real;
18     double imag;
19 };
20 void Complex::show()const {
21     if (imag > 0)
22         cout << real << "+" << imag << "i";
23     if (imag < 0)
24         cout << real << imag << "i"  ;
25     if (imag == 0)
26         cout << real ;
27 }
28 void Complex::add(const Complex& c) {
29     real += c.real;
30     imag += c.imag;
31 }
32 Complex add(const Complex& c1, const Complex& c2) {
33     Complex c;
34     c.real = c1.real + c2.real;
35     c.imag = c1.imag + c2.imag;
36     return c;
37 }
38 bool is_equal(const Complex& c1, const Complex& c2) {
39     if (c1.real == c2.real && c1.imag == c2.imag)
40         return true;
41     else
42         return false;
43 }
44 double abs(Complex& c) {
45     double ans;
46     ans = sqrt(c.real * c.real + c.imag * c.imag);
47     return ans;
48 }

#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();
}