运算符的重载（一目运算）

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05 月04  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：
12.* 程序输出：
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;elseoutput<<"("<<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;}