第十二周上机时间项目——项目1—实现复数类中的运算符重载

/*

 *Copyright (c) 2016,烟台大学计算机与控制工程学院 

 *All rights reserved. 
 *文件名称：fushu.cpp 
 *作    者：郑志金
 *完成日期：2016年6月2日 
 *版 本 号：v1.0 
 * 
 *问题描述：用类的友元函数，定义复数类重载运算符，使之能用于复数的加减乘除
 *输入描述：无
 *输出描述：输出复数信息

#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,const Complex &c2);

    friend Complex operator-(const Complex &c1,const Complex &c2);

    friend Complex operator*(const Complex &c1,const Complex &c2);

    friend Complex operator/(const Complex &c1,const Complex &c2);

    void display();

private:

    double real;

    double imag;

};

void Complex::display()

{

    cout<<"("<<real<<","<<imag<<"i)"<<endl;

}

Complex operator+(const Complex &c1,const Complex &c2)

 {

     Complex c;

     c.real=c1.real+c2.real;

     c.imag=c1.imag+c2.imag;

     return c;

 }

Complex operator-(const Complex &c1,const Complex &c2)

{

    Complex c;

    c.real=c1.real-c2.real;

    c.imag=c1.imag-c2.imag;

    return c;

 

}

Complex operator*(const Complex &c1,const 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,const 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;

}

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;

}

运行结果：