实现复数类中的运算重载

/*

* 程序的版权和版本声明部分:

* Copyright (c) 2011, 烟台大学计算机学院

* All rights reserved.

* 文件名称：test.cpp

* 作 者：崔俊

* 完成日期：2014年 4 月 22日

* 版 本 号：v1.0

* 对任务及求解方法的描述部分:

* 输入描述：无

* 问题描述：

* 程序输出：

* 问题分析：略

* 算法设计：略

*/

#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 x);

Complex operator-(double x);

friend Complex operator+(double x,Complex c);

friend Complex operator-(double x,Complex c);

void display();

double geta()

{

return real;

}

double getb()

{

return imag;

}

private:

double real;

double imag;

};

//下面定义成员函数

void Complex::display()

{

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

}

Complex Complex::operator+(double x)

{

return Complex(x+real,imag);

}

Complex Complex::operator-(double x)

{

return Complex(real-x,imag);

}

int main()

{

Complex c1(3,4),c2;

double d=4;

cout<<"c1+d"<<endl;

c2=c1+d;

c2.display();

cout<<"c1-d"<<endl;

c2=c1-d;

c2.display();

cout<<"d+c1"<<endl;

c2=d+c1;

c2.display();

cout<<"d-c1"<<endl;

c2=d-c1;

c2.display();

return 0;

}

Complex operator+(double x,Complex c)

{

return Complex(x+c.real,c.imag);

}

Complex operator-(double x,Complex c)

{

return Complex(x-c.real,c.imag);

}