第九实验报告任务一

/* (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： 重载输入输出流
* 作 者： 郭岩岩

* 完成日期：2012 年4月 16日

* 版 本 号： vc.1

* 对任务及求解方法的描述部分

* 输入描述：

* 问题描述：

* 程序输出：

*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;}
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);
friend istream& operator>>(istream &input,Complex &c);
friend ostream& operator<<(ostream &output,Complex &c);
private:
double real;
double imag;
};

//方案二友元函数
istream& operator>>(istream &input,Complex &c)
{
char a;
cout<<"请输入一个复数：";
input>>c.real>>c.imag>>a;
return input;
}
ostream& operator<<(ostream &output,Complex &c)
{
output<<c.real;
if(c.imag >0)
{
output<<"+";
}
output<<c.imag <<"i"<<endl;
return output;
}

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)
{
Complex c;
c.real =c1.real*c2.real -c1.imag*c2.imag  ;
c.imag=c1.imag*c2.real+c2.imag*c1.real ;
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+c2.imag*c1.real)/(c2.real *c2.real +c2.imag *c2.imag ) ;
return c;
}
int main()
{
Complex c1,c2,c3;
cin>>c1;
cout<<"c1=";
cout<<c1;
cin>>c2;
cout<<"c2=";
cout<<c2;
c3=c1+c2;
cout<<"c1+c2=";
cout<<c3;
c3=c1-c2;
cout<<"c1-c2=";
cout<<c3;
c3=c1*c2;
cout<<"c1*c2=";
cout<<c3;
c3=c1/c2;
cout<<"c1/c2=";
cout<<c3;
system("pause");
return 0;
}