C++：二元运算符重载（成员函数与全局函数两种实现形式）

 首先，欢迎并感激博友进行知识补充与修正。

#include <iostream>

using namespace std;

class Complex
{
public:
	Complex(int a=0, int b=0)
	{
		this->a = a;
		this->b = b;
	}
	void print()
	{
		cout << a << "+" << b << "i" << endl;
	}
	//成员函数实现二元运算符重载
	void operator+(Complex &c2)
	{
		this->a += c2.a;
		this->b += c2.b;
	}
private:
	int a, b;
	/*friend Complex operator+(Complex &c1, Complex &c2);*/
};

////全局函数实现二元运算符重载，需要声明为友元函数
//Complex operator+(Complex &c1, Complex &c2)
//{
//	Complex c;
//	c.a = c1.a + c2.a;
//	c.b = c1.b + c2.b;
//	return c;
//}

int main()
{
	/*Complex c1(1, 2), c2(3, 4);
	Complex c3 = c1 + c2;
	c3.print();*/

	Complex c1(1, 2), c2(3, 4);
	c1.operator+(c2);
	c1.print();

	system("pause");
	return 0;
}