C++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);//声明重载运算符的函数
void display( );
private:
double real;
double imag;
};
Complex Complex::operator+(Complex &c2) //定义重载运算符的函数
{
Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;
}
void Complex::display( )
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main( )
{
Complex c1(3,4),c2(5,-10),c3;
c3=c1+c2; //运算符+用于复数运算
cout<<"c1=";c1.display( );
cout<<"c2=";c2.display( );
cout<<"c1+c2=";c3.display( );
return 0;
}