C++中运算符重载实例

/*
 * File:   mian.cpp
 * Author: yubao
 *
 * Created on June 1, 2009, 11:27 PM
 */

#include <iostream>
using namespace std;

class complex
{
public:
    complex(double r=0.0, double i=0.0)
    {
        real=r;
        image=i;
    }
    complex operator +(complex c2);
    complex operator -(complex c2);
    void display();
private:
    double real;
    double image;
};


complex complex::operator +(complex c2)
{
    return complex(real+c2.real,image+c2.image);
}

complex complex::operator -(complex c2)
{
    return complex(real-c2.real,image-c2.image);
}

void complex::display()
{
    cout<<"("<<real<<","<<image<<")"<<endl;
}


/*
 *
 */
int main(int argc, char** argv) {
    complex c1(5,4),c2(2,10),c3;
    cout<<"c1=";
    c1.display();
    cout<<"c2=";
    c2.display();
    c3=c1-c2;
    cout<<"c3=c1-c2=";
    c3.display();
    c3=c1+c2;
    cout<<"c3=c1-c2=";
    c3.display();

    return 0;
}