第九周上机任务1

/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：renwu.cpp
* 作    者：宋本一
* 完成日期：2012 年 4 月 16 日
* 版 本 号：9.1
* 对任务及求解方法的描述部分
* 输入描述：略
* 问题描述：略
* 程序输出：略
* 程序头部的注释结束
*/
#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);
friend ostream& operator << (ostream&,Complex&);
friend istream& operator >> (istream&,Complex&);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
istream& operator >> (istream& input,Complex& c)
{
input>>c.real>>c.imag;
return input;
}
ostream& operator << (ostream& output,Complex& c)
{
output<<"("<<c.real<<" "<<c.imag<<"i)"<<endl;
return output;
}

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;
double d=c2.real*c2.real+c2.imag*c2.imag;
c.real=(real*c2.real+imag*c2.imag)/d;
c.imag=(imag*c2.real-real*c2.imag)/d;
return c;
}

void Complex::display( )
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}

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();
system("pause");
return 0;
}