8-1-(1)-友元函数的运算符的重载

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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21  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：友元函数时，自定义两个 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;}       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);       void display();    private:      double real;      double imag;};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){   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);}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();    return 0;}

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