第八周--项目1--实现复数类中的运算符重载

/*
* Copyright (c) 2011, 烟台大学计算机学院
* All rights reserved.
* 作    者：王静
* 完成日期：2013  年 4  月 24  日
* 版 本 号：v1.0
* 输入描述：
* 问题描述：
* 程序输出：
* 问题分析：
* 算法设计：略
*/
#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;
};

Complex operator+(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real+c2.real;
c.imag=c1.imag+c2.imag;
return c;
}
Complex operator-(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real-c2.real;
c.imag=c1.imag-c2.imag;
return c;
}
Complex operator*(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real*c2.real-c1.imag*c2.imag;
c.imag=c1.imag*c2.real+c1.real*c2.imag;
return c;
}
Complex operator/(Complex &c1,Complex &c2)
{
Complex c;
c.real=(c1.real/c2.real+c1.imag/c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
c.imag=(c1.imag/c2.real-c1.real/c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
return c;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main( )
{
Complex c1(3,4),c2(5,-10),c3;
cout<<"c1+c2=";
c3=c1+c2;
c3.display( );
cout<<"c1-c2=";
c3=c1-c2;
c3.display( );
cout<<"c1*c2=";
c3=c1*c2;
c3.display( );
cout<<"c1/c2=";
c3=c1/c2;
c3.display( );
system("pause");
return 0;
}