simplefactory.cpp

《Visual C++视频技术方案宝典》配套光盘

// SimpleFactory.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "ostream.h"


//定义抽象类
class CAnimal
{
protected:
	int  m_Weight;  //重量
public:
	virtual void Cry() = 0;
};
//定义具体类
class CFish:  public CAnimal
{
public:
	virtual void Cry()
	{
		cout <<"I am Fish!\n";
	}
};
class CBird : public CAnimal
{
public:
	virtual void Cry()
	{
		cout <<"I am Bird! \n";
	}
};
//定义工厂类
class CFactory
{
public:
	CAnimal* CreateObj(int Flag)
	{
		switch (Flag)
		{
		case 0:
			return new CBird();
			break;
		case 1: 
			return new CFish();
			break;
		}
	}
};

int main(int argc, char* argv[])
{
	//定义工厂对象
	CFactory factory;
	CAnimal * pAnimal;
	pAnimal = factory.CreateObj(0);
	pAnimal->Cry();
	delete pAnimal;
	pAnimal = factory.CreateObj(1);
	pAnimal->Cry();
	delete pAnimal;

	return 0;
}