c++不常用功能之——运算符重载

#include<iostream>using namespace std;class Complex{public:Complex(){real = 0;imag = 0;}Complex(double r, double i){real = r;imag = i;}Complex operator+(Complex& c2);Complex& operator++();Complex& operator++(int i);void display();private:double real;double imag;};Complex Complex::operator+(Complex& c2){Complex c;c.real = real + c2.real;c.imag = imag + c2.imag;return c;}//成员函数重载前置++Complex& Complex::operator++(){real++;imag++;return *this;}//成员函数重载后置++Complex& Complex::operator++(int i){real++;imag++;return *this;}void Complex::display(){cout << "(" << real << "," << imag << "i)" << endl;}int main(){Complex c1(3, 4), c2(5, -10), c3;c3 = ++c1;cout << "c3 = "; c3.display();return 0;}