第八周项目一：用类的成员函数完成运算符的重载（任务一）

/*  
* 程序的版权和版本声明部分  
* Copyright (c)2013, 烟台大学计算机学院学生  
* All rightsreserved.  
* 文件名称： object.cpp  
* 作者：李蒙  
* 完成日期： 2013年04月14日  
* 版本号： v1.0  
* 输入描述：无  
* 问题描述：无  
* 程序输出：无  
*/    
#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 a;
	a.real=real+c2.real;
	a.imag=imag+c2.imag;
	return a;
}
Complex Complex::operator -(Complex &c2)
{
	Complex b;
	b.real=real-c2.real;
	b.imag=imag-c2.imag;
	return b;
}
Complex Complex::operator *(Complex &c2)
{
	Complex c;
	c.real=real*c2.real+(-imag*c2.imag);
	c.imag=real*c2.imag+c2.real*imag;
	return c;
}
Complex Complex::operator /(Complex &c2)
{
	Complex d;
	d.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
	d.imag=real*(-c2.imag)+c2.real*imag;
	return d;
}
void Complex::display()
{
	cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面是测试函数
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;
}