第八周-项目一-复数类中的运算符重载（3）

/*
* 程序的版权和版本声明部分:
* Copyright (c) 2013.烟台大学计算机学院
* All rights reserved.
* 文件名称： 复数类中的运算符重载
* 作    者：冯冬影
* 完成日期：2014 年 4月 14日
* 版 本 号：v1.0
* 对任务及求解方法的描述部分:
* 输入描述：
* 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;
    }
    Complex operator+(double t);
    Complex operator-(double t);
    Complex operator*(double t);
    Complex operator/(double t);
    friend  Complex operator+(double t,Complex &c2);
    friend  Complex operator-(double t,Complex &c2);
    friend Complex operator*(double t,Complex &c2);
    friend Complex operator/(double t,Complex &c2);

    void display();
private:
    double real;
    double imag;
};
//下面定义成员函数
Complex Complex::operator+(double t)
{
    Complex c;
    c.real=real+t;
    c.imag=imag;
    return c;
}
Complex Complex::operator-(double t)
{
    Complex c;
    c.real=real-t;
    c.imag=imag;
    return c;
}
Complex Complex::operator*(double t)
{
    Complex c;
    c.real=real*t;
    c.imag=imag*t;
    return c;
}
Complex Complex::operator/(double t)
{
    Complex c;
    c.real=real/t;
    c.imag=imag/t;
    return c;
}
Complex operator+(double t,Complex &c2)
{
    Complex c;
    c.real=t+c2.real;
    c.imag=c2.imag;
    return c;
}
Complex operator-(double t,Complex &c2)
{
    Complex c;
    c.real=t-c2.real;
    c.imag=-c2.imag;
    return c;
}
Complex operator*(double t,Complex &c2)
{
    Complex c;
    c.real=t*c2.real;
    c.imag=t*c2.imag;
    return c;
}
Complex operator/(double t,Complex &c2)
{
    Complex c;
    c.real=(t*c2.real)/(c2.real*c2.real+c2.imag+c2.imag);
    c.imag=(t*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    return c;
}

void Complex::display()
{
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面定义用于测试的main()函数
int main()
{
    Complex c1(3,4),c3;
    double a=5;
    cout<<"a="<<a<<endl;
    cout<<"c1=";
    c1.display();
    c3=c1+a;
    cout<<"c1+a=";
    c3.display();
    cout<<"a+c1=";
    c3.display();
    c3=c1-a;
    cout<<"c1-a=";
    c3.display();
    c3=a-c1;
    cout<<"a-c1";
    c3.display();
    c3=c1*a;
    cout<<"c1*a=";
    c3.display();
    c3=a*c1;
    cout<<"a*c1=";
    c3.display();
    c3=c1/a;
    cout<<"c1/a=";
    c3.display();
    c3=a/c1;
    cout<<"a/c1=";
    c3.display();
    return 0;
}

运行结果