学步园

/*
* 程序的版权和版本声明部分
* Copyright (c)2012, 烟台大学计算机学院学生
* All rightsreserved.
* 作者：    李洋
* 完成日期： 2013年 4 月 20 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;}
	friend Complex operator+(Complex &c1,Complex &c2);
	friend Complex operator-(Complex &c1,Complex &c2);
	friend Complex operator*(Complex &c1,Complex &c2);
	friend Complex operator/(Complex &c1,Complex &c2);
	void display();
 private:
	double real;
	double imag;
};

//下面定义成员函数
Complex operator+(Complex &c1,Complex &c2)
{
	return Complex(c1.real+c2.real,c1.imag+c2.imag);
}

Complex operator-(Complex &c1,Complex &c2)
{
	return Complex(c1.real-c2.real,c1.imag-c2.imag);
}

Complex operator*(Complex &c1,Complex &c2)
{
	return Complex(c1.real*c2.real-c1.imag*c2.imag,c1.real*c2.imag+c1.imag*c2.real);
}

Complex operator/(Complex &c1,Complex &c2)
{
	double d;
	d=c2.real*c2.real+c2.imag*c2.imag;
	return Complex((c1.real*c2.real+c1.imag*c2.imag)/d,(c1.imag*c2.real-c1.real*c2.imag)/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();

	std::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;
}