第八周实验报告（任务1-方案2）

来源：互联网发布：淘宝上怎么改评价编辑：程序博客网时间：2024/04/30 01:55

程序头部注释开始
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：     用友元函数完成运算符重载
* 作    者：     郭广建
* 完成日期： 2012年    04 月  10     日
* 版本号： 1.0

题目介绍：

方案二：请用类的友元函数，而不是成员函数，完成上面提及的运算符的重载；

源程序：

#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 ) , (c1.real * c2.imag + c1.imag + c2.real));}Complex operator/(Complex &c1, Complex &c2){return Complex((c1.real * c2.real + c1.imag * c2.imag )/(c2.real * c2.real + c2.imag * c2.imag) ,( c1.imag + c2.real - c1.real * c2.imag)/(c2.real * c2.real + c2.imag * c2.imag));}void Complex::display(){cout << '(' << real << ',' << imag << ')' <<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();    system("pause");    return 0;}

运行结果：