第九周-项目一运算符重载

/*
* 程序的版权和版本声明部分:
* Copyright (c) 2013.烟台大学计算机学院
* All rights reserved.
* 文件名称： 复数类中的运算符重载
* 作    者：冯冬影
* 完成日期：2014 年 4月 22日
* 版 本 号：v1.0
* 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:
*/
#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 Complex operator-(Complex &c);//一目运算符-，-c相当于0-c;
friend istream& operator>>(istream&,Complex&);//声明友元重载运算符“>>"函数
friend ostream& operator<<(ostream&,Complex&);//声明友元重载运算符"<<"函数
private:
double real;
double imag;
};
//下面定义成员函数
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+c2.imag*real;
return c;
}
Complex Complex::operator/(Complex &c2)
{
Complex c;
c.real=(real*c2.real-imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
return c;
}
Complex operator-(Complex &c)
{
Complex c2;
c2.real=0-c.real;
c2.imag=0-c.imag;
return c2;
}
ostream& operator<<(ostream&output,Complex &c)
{
output<<"("<<c.real<<","<<c.imag<<"i)"<<endl;
return output;
}
istream& operator>>(istream&input,Complex &c)
{
input>>c.real>>c.imag;
return input;
}

//下面定义用于测试的main()函数
int main()
{
Complex c1,c2;
cout<<"请分别输入两个复数的实部和虚部：";
cin>>c1>>c2;
Complex c(5,6),c3;;
cout<<"c=";
cout<<c;
c3=-c;
cout<<"c3=";
cout<<c3;
cout<<"c1=";
cout<<c1;
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;
return 0;
}