实现复数类中的运算符重载

/*
*Corpyright (c)2013,烟台大学计算机学院
*All right reseved.
*作者：z张梦佳
*完成日期：2014年4月14日
*版本号：v1.0
*输入描述：
*问题描述:复shu类！
*程序输出：
*问题分析：
*算法设计：
*/
#include <iostream>
#include <cmath>
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
void Complex::display()
{
cout<<"("<<real<<","<<imag<<")"<<endl;
}
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-imag+c2.imag;
c.imag=imag*c2.real+real*c2.imag;
return c;
}
Complex Complex::operator/(Complex &c2)
{
Complex c;
c.real=(real*c2.real+imag+c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
return c;
}

//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;
}