<pre name="code" class="cpp">/******************************************************************************************
complex.hpp:
	Copyright (c) Bit Software, Inc.(2013), All rights reserved.

Purpose:
	宣告並實現一個複數類

難度：**

Author:
	xxx

Created Time:
	2015-4-26
******************************************************************************************/

#ifndef COMPLEX_HPP_INCLUDED
#define COMPLEX_HPP_INCLUDED
#include <iostream>
using namespace std;
class complex
{
public:
	// 帶預設值的建構函式
	complex (double real = 0, double image = 0)
		:_real(real)
		,_image(image)
	{
		cout<<"complex (double real = 0, double image = 0)"<<endl;
	}

	// 解構函式
	~complex()
	{
		cout<<"~complex()"<<endl;
	}

	// 拷貝建構函式
	complex (const complex& d)
        :_image(d._image)
		,_real(d._real)
	{
		cout<<"complex (const complex& d)"<<endl;
	}

	// 賦值運算子過載
	// 思考為什麼operator=賦值函式需要一個date&的返回值？？
	complex& operator= (const complex& d)
	{
		cout<<"operator= (const complex& d)"<<endl;

		if (this != &d)
		{
			this->_real = d._real;
			this->_image = d._image;
		}
		return *this;
	}

	// 取地址運算子過載
	complex* operator& ()
	{
		cout<<"operator&()"<<endl;
		return this;
	}

	// const修飾的取地址運算子過載
	const complex* operator& () const
	{
		cout<<"operator&() const"<<endl;
		return this;
	}

	void display()
	{
		cout<<"real:"<<_real<<"--image:"<<_image<<endl<<endl;
	}
	complex operator+(const complex& c)
	{
        cout<<"operator+(const complex& c)"<<endl;
        return complex(_real+c._real,_image+c._image);
	}

	complex operator-(const complex& c)
	{
        cout<<"operator-(const complex& c)"<<endl;
        return complex(_real-c._real,_image-c._image);
	}
	complex operator*(const complex& c)
	{
        cout<<"operator*(const complex& c)"<<endl;
        return complex(_real*c._real-_image*c._image,c._image*_real+_image*c._real);
	}
	complex operator/(const complex& c)
	{
        cout<<"operator/(const complex& c)"<<endl;
        return complex<span style="font-family: Arial, Helvetica, sans-serif;">((_real/c._real+_image*c._image)/(c,_real*c._real+c._image*c._image),(_image*c._real-_real*c._image)/(c,_real*c._real+c._image*c._image))</span><span style="font-family: Arial, Helvetica, sans-serif;">; </span>
	}

private:
	double _real;
	double _image;
};

#endif // COMPLEX_HPP_INCLUDED
 

主函式：

#include "complex.hpp"
int main()
{
    //test_complex1();
    cout << "**********************" << endl;
    complex a(1.1,2.2);
    complex b(3.3,4.4);
    complex c;
    c = a + b;
    c.display();

    c = a - b;
    c.display();

    c = a * b;
    c.display();

    c = a / b;
    c.display();


    return 0;
}