//?Calculator.cpp?:?定義控制臺應用程序的入口點。
//

#include?“stdafx.h“
#include
using?namespace?std;


//基類
class?COperation
{
public:
	double?m_nFirst;
	double?m_nSecond;
	virtual?double?GetResult（）
	{
		double?dResult?=?0;
		return?dResult;
	}
};
//加法
class?AddOperation?:?public?COperation
{
public:
	virtual?double?GetResult（）
	{
		return?m_nFirst+m_nSecond;
	}
};
//減法
class?SubOperation?:?public?COperation
{
public:
	virtual?double?GetResult（）
	{
		return?m_nFirst-m_nSecond;
	}
};
//乘法
class?MulOperation?:?public?COperation
{
public:
	virtual?double?GetResult（）
	{
		return?m_nFirst*m_nSecond;
	}
};
//除法
class?DivOperation?:?public?COperation
{
public:
	virtual?double?GetResult（）
	{
		return?m_nFirst?/?m_nSecond;
	}
};

//工廠類
class?CCalculatorFactory
{
public:
	static?COperation*?Create（char?cOperator）;
};

COperation*?CCalculatorFactory::Create（char?cOperator）
{
	COperation?*oper;
	
	switch?（cOperator）
	{
	case?‘+‘:
		oper=new?AddOperation（）;
		break;
	case?‘-‘:
		oper=new?SubOperation（）;
		break;
	case?‘*‘:
		oper=new?MulOperation（）;
		break;
	case?‘/‘:
		oper=new?DivOperation（）;
		break;
	default:
		oper=new?AddOperation（）;
		break;
	}
	return?oper;
}

int?_tmain（int?argc?_TCHAR*?argv[]）
{
	float?ab;
	char?c;
	cout<<“請輸入數字A并回車“<	cin>>a;
	cout<<“請輸入運算符號（+、-、*、/）并回車“<	cin>>c;
	while?（c?!=?‘+‘?&&?c?!=?‘-‘&&?c?!=?‘*‘&&?c?!=?‘/‘）
	{
		cout<<“輸入不正確！“<		cout<<“請輸入運算符號（+、-、*、/）并回車“<		cin>>c;
	}
	cout<<“請輸入數字B并回車“<	cin>>b;
	while?（c?==?‘/‘?&&?b?==?0）
	{
		cout<<“輸入不正確！除數不能為0！“<		cout<<“請輸入數字B并回車“<		cin>>b;
	}
	cout<	COperation?*?op=CCalculatorFactory::Create（c）;
	op->m_nFirst=a;
	op->m_nSecond=b;
	cout<GetResult（）<	system（“pause“）;?
	return?0;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1973??2011-12-04?16:29??Calculator\Calculator.cpp

?????文件??????19456??2011-12-04?16:30??Calculator\Calculator.ncb

?????文件????????909??2011-12-04?15:43??Calculator\Calculator.sln

????..A..H.??????8704??2011-12-04?16:30??Calculator\Calculator.suo

?????文件???????3844??2011-12-04?15:43??Calculator\Calculator.vcproj

?????文件???????2379??2011-12-04?16:29??Calculator\Debug\BuildLog.htm

?????文件?????299008??2011-12-04?16:29??Calculator\Debug\Calculator.exe

?????文件?????898672??2011-12-04?16:29??Calculator\Debug\Calculator.ilk

?????文件?????310800??2011-12-04?16:29??Calculator\Debug\Calculator.obj

?????文件????2949120??2011-12-04?16:21??Calculator\Debug\Calculator.pch

?????文件????1264640??2011-12-04?16:29??Calculator\Debug\Calculator.pdb

?????文件??????15423??2011-12-04?16:21??Calculator\Debug\stdafx.obj

?????文件?????175104??2011-12-04?16:29??Calculator\Debug\vc70.idb

?????文件?????159744??2011-12-04?16:29??Calculator\Debug\vc70.pdb

?????文件???????1009??2011-12-04?15:43??Calculator\ReadMe.txt

?????文件????????214??2011-12-04?15:43??Calculator\stdafx.cpp

?????文件????????195??2011-12-04?15:43??Calculator\stdafx.h

?????目錄??????????0??2011-12-04?16:32??Calculator\Debug

?????目錄??????????0??2011-12-04?16:32??Calculator

-----------?---------??----------?-----??----

??????????????6111194????????????????????19