第8周项目1-2用友元函数完成运算符的重载

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编号及代码：/**Copyright(c)2015,烟台大学计算机与工程学院*All rights reserved;*文件名称：score.cpp*作者：范星月*完成日期：2015年4月24日*版本号：v1.0**问题描述：用友元函数完成运算符的重载*问题输入：无*问题输出：输出复数*/#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<<")"<<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;}

学习总结：

friend Complex operator+(Complex &c1, Complex &c2);//友元函数的声明

Complex operator+(Complex &c1,Complex &c2){ return Complex(c1.real+c2.real,c1.imag+c2.imag);}//友元函数的定义

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