第八周上机任务（友元函数运算符的重载）

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/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 文件名称： object.cpp* 作者：孙永* 完成日期： 2013年4 月 18 日* 版本号： v1.0* 输入描述：无* 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;}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;};//下面定义成员函数 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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