操作符的重载

Type operator sign(const Type p1,const Type p2)  //sign是操作符（+，-，*，/）
{
   Type ret;

  
   return ret;     
}

#include <stdio.h>

class Complex 
{
    int a;
    int b;
public:
    Complex(int a = 0, int b = 0)
    {
        this->a = a;
        this->b = b;
    }
    
    int getA()
    {
        return a;
    }
    
    int getB()
    {
        return b;
    }
    
    friend Complex operator + (const Complex& p1, const Complex& p2);  // 定义类的友元函数
};

Complex operator + (const Complex& p1, const Complex& p2)  // 操作符 + 重载的定义。已经用函数扩展了操作符的功能
{
    Complex ret;
    
    ret.a = p1.a + p2.a;
    ret.b = p1.b + p2.b;
    
    return ret;
}

int main()
{

    Complex c1(1, 2);
    Complex c2(3, 4);
    Complex c3 = c1 + c2;         // 两种写法都行，直接调用operator + 函数。
    //Complex c3 = operator + (c1, c2)    
    
    printf("c3.a = %d, c3.b = %d\n", c3.getA(), c3.getB());
    
    return 0;
}