第八周——重载运算符——项目一（2）利用友元函数实现+-*/重载

来源：互联网发布：2017软考程序员真题编辑：程序博客网时间：2024/06/13 22:02

问题及代码：

/**Copyright (c) 2014,烟台大学计算机学院*All rights reserved.*文件名称:lily.cpp*作者:李莉*完成日期:2015年4月2日版本号:v1.0**问题描述：项目1-实现复数类中的运算符重载】（1）请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘除*程序输入：无输入*程序输出：运算后的结果*/#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+(const Complex &c1, Complex &c2);    friend Complex operator-(const Complex &c1, Complex &c2);    friend Complex operator*(const Complex &c1, Complex &c2);    friend Complex operator/(const Complex &c1, Complex &c2);    void display();private:    double real;    double imag;};Complex operator+(const Complex &c1, Complex &c2){    Complex c;    c.real=c1.real+c2.real;    c.imag=c1.imag+c2.imag;    return c;}Complex operator-(const Complex &c1, Complex &c2){    Complex c;    c.real=c1.real-c2.real;    c.imag=c1.imag-c2.imag;    return c;}Complex operator*(const Complex &c1, Complex &c2){    Complex c;    c.real=c1.real*c2.real-c1.imag*c2.imag;    c.imag=c1.imag*c2.real+c1.real*c2.imag;    return c;}Complex operator/(const Complex &c1, Complex &c2){    Complex c;    c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);    return c;}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();    return 0;}

运算结果：

0 0