9-1-实现复数的运算符重载

01./*
02.* 程序的版权和版本声明部分:
03.* Copyright (c) 2011, 烟台大学计算机学院
04.* All rights reserved.
05.* 文件名称：test.cpp
06.* 作    者：刘芳
07.* 完成日期：2014 年04 月 22 日
08.* 版 本 号：v1.0
09.* 对任务及求解方法的描述部分:
10.* 输入描述：无
11.* 问题描述： 输入复数的实部与虚部
12.* 程序输出： 输出复数
13.* 问题分析：略
14.* 算法设计：略
15.*/

#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);
Complex operator-();
friend istream& operator>>(istream&,Complex&);
friend ostream& operator<<(ostream&,Complex&);
void display();
private:
double real;
double imag;

};
Complex Complex::operator-()
{
Complex c;
c.real=0-real;
c.imag=0-imag;
return c;
}
istream& operator>>(istream& input,Complex& c1)
{
cout<<"请输入虚数的实部和虚部："<<endl;
input>>c1.real>>c1.imag;
return input;
}
ostream& operator<<(ostream& output,Complex& c1)
{
if(c1.imag<0)
output<<"("<<c1.real<<c1.imag<<"i)"<<endl;
else if(c1.imag>0)
output<<"("<<c1.real<<"+"<<c1.imag<<"i)"<<endl;
else
output<<"("<<c1.real<<")"<<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;
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;
}
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();
cin>>c3;
cout<<c3<<endl;

return 0;
}