2014-第九周项目一----<<,>>的运算符重载

/*
*程序的版权和版本声明部分：
*Copyright(c)2014，烟台大学计算机学院学生
*All rights reserved.
*文件名称：
*作者:刘晓晓
*完成日期：2014年 04月22号
*版本号：v1.0
*对任务及求解方法的描述部分：
*输入描述: 无
*问题描述:实现复数类中的运算符的重载
*程序输出：无
*问题分析：
*算法设计：
*/

#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&);
Complex operator-();
void display();
private:
double real;
double imag;
};
ostream&operator<<(ostream& output,Complex&c)
{
output<<"("<<c.real<<"+"<<c.imag<<"i";
return output;
}
istream&operator>>(istream&input,Complex&c)
{
cout<<"input real and imag part of Complex number:";
input>>c.real>>c.imag;
return input;

}
Complex Complex::operator-()
{
Complex c;
c.real=-real;
c.imag=-imag;
return c;

}
//下面定义成员函数
void Complex:: display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;

}
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;
//复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i

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;

}

//下面定义用于测试的main()函数
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();
c3=-c1;
cout<<"-c1=";
c3.display();
return 0;
}