课堂对Complex类运算符重载的小练习

/*代码如下*/

#include "pch.h"
#include <iostream>
using namespace std;

class Complex {
public:
    Complex(double r = 0.0, double i = 0.0) :real(r), imag(i){}
    Complex operator+(const Complex &x);
    void print();
    friend Complex operator-(const Complex &c1, Complex &c2);
private:
    double real;
    double imag;
};

 Complex Complex::operator+(const Complex &x) {
     return Complex(real + x.real, imag + x.imag);
 }

 void Complex::print() {
     if (real == 0)
         cout << imag << "i" << endl;
     else if(imag == 0)
         cout << real << endl;
     else
         cout << real << "+" << imag << "i" << endl;
 }

 Complex operator-(const Complex &c1, Complex &c2) {
     return Complex(c1.real - c2.real, c1.imag - c2.imag);
 }

 int main() {
     Complex c1(2, 2.5);
     cout << "c1=";
     c1.print();
     Complex c2(4.5);
     cout << "c2=";
     c2.print();
     Complex c3;
     c3 = c1 + c2;
     cout << "c1+c2=";
     c3.print();
     c3 = c1 - c2;
     cout << "c1-c2=";
     c3.print();
     return 0;
 }

/*运行截图*/