工厂方法

// 简单工厂_工厂方法_抽象工厂.cpp :
//

#include "stdafx.h"
#include <string>
using namespace std;

class Fruit
{
public:
	Fruit()
	{
		printf("Fruit\n");
	}
	virtual ~Fruit()
	{
		printf("~Fruit\n");
	}
};

class Banana :public Fruit
{
public:
	Banana()
	{
		printf("Banana\n");
	}
	~Banana()
	{
		printf("~Banana\n");
	}
};

class Apple :public Fruit
{
public:
	Apple()
	{
		printf("Apple\n");
	}
	~Apple()
	{
		printf("~Apple\n");
	}
};

class Orange :public Fruit
{
public:
	Orange()
	{
		printf("Orange\n");
	}
	~Orange()
	{
		printf("~Orange\n");
	}
};

class Factory
{
public:
	virtual Fruit* CreateProduct() = 0;
	virtual ~Factory()
	{
		printf("~Factory\n");
	}
};

class AppleFactory :public Factory
{
public:
	Fruit* CreateProduct()
	{
		return new Apple();
	}
	~AppleFactory()
	{
		printf("~AppleFactory\n");
	}
};

class BananaFactory :public Factory
{
public:
	Fruit* CreateProduct()
	{
		return new Banana();
	}
	~BananaFactory()
	{
		printf("~BananaFactory\n");
	}
};

class OrangeFactory :public Factory
{
public:
	Fruit* CreateProduct()
	{
		return new Orange();
	}
	~OrangeFactory()
	{
		printf("~OrangeFactory\n");
	}
};



int main(int argc, _TCHAR* argv[])
{
	//用户只面向 Factory 和 Fruit这两个抽象
	Factory * f = new OrangeFactory();
	Fruit *fruit = f->CreateProduct();
	delete f;
	delete fruit;
}