成员函数运算+ - * /

/* 
02.* 程序的版权和版本声明部分 
03.* Copyright (c)2012, 烟台大学计算机学院学生 
04.* All rightsreserved. 
05.* 文件名称： object.cpp 
06.* 作者：刘明亮 
07.* 完成日期： 2013年 4 月19日 
08.* 版本号： v1.0 
09.* 输入描述： 
10.* 问题描述： 
11.* 程序输出： 
*/  
#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 &c2);
	Complex operator*(Complex &c2);
	Complex operator/(Complex &c2);
	void display();
 private:
	double real;
	double imag;
};


//下面定义成员函数
Complex Complex::operator+(Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}

Complex Complex::operator-(Complex &c2)
{
    Complex c;
    c.real=real-c2.real;
    c.imag=imag-c2.imag;
    return c;
}

Complex Complex::operator*(Complex &c2)
{
    Complex c;
    c.real=real*c2.real;
    c.imag=imag*c2.imag;
    return c;
}

Complex Complex::operator/(Complex &c2)
{
    Complex c;
    c.real=real/c2.real;
    c.imag=imag/c2.imag;
    return c;
}

void Complex::display()
{
    cout<<"("<<real<<","<<imag<<")\n";
}


//下面定义用于测试的main()函数
int main()
{
	Complex c1(3,4),c2(5,-10),c3;
	cout<<"c1=";
	c1.display();
	cout<<"c2=";
	c2.display();
	c3=c1+c2;
	cout<<"c1+c2=";
	c3.display();
	c3=c1-c2;
	cout<<"c1-c2=";
	c3.display();
	c3=c1*c2;
	cout<<"c1*c2=";
	c3.display();
	c3=c1/c2;
	cout<<"c1/c2=";
	c3.display();
	return 0;
}