c++ 设计模式之简单的工厂模式

调试环境：vs2010

// test0.cpp : 定义控制台应用程序的入口点。

//





#include "stdafx.h"

#include <iostream>

using namespace std;

class COperation

{

public:

int first;

int second;

virtual double getResult()

{

return 0;

}

};

class addOperation : public COperation

{

virtual double getResult()

{

return first + second;

}

};

class subOperation: public COperation

{

virtual double getResult()

{

return first - second;

}

};

class CFactory

{

public:

static COperation* Create(char ope)

{

switch(ope)

{

case '+':

return new addOperation();

break;

case '-':

return new subOperation();

break;

}

}

};

int _tmain(int argc, _TCHAR* argv[])

{

COperation *te = CFactory::Create('-');

te->first = 1;

te->second = 2;

cout<<te->getResult()<<endl;

return 0;

}