工厂方法模式

/*
把工厂抽象出来，一个工厂负责一个产品
父类虚函数权限是public，子类重写可以是private
相较于简单工厂模式，工厂方法模式符合“开闭原则”
助记：虚拟工厂生产虚拟产品，虚拟产品申明虚拟行为
*/
#include <iostream>
using namespace std;
//抽象产品
class AbstractProduct{
public:
	virtual void dpname() = 0;
	virtual void play() = 0;
};

class basketball :public AbstractProduct{
public:
	basketball(){};
	~basketball(){};
private:
	void dpname(){
		cout << "im basketball" << endl;
	}
	void play(){
		cout << "play basketball" << endl;
	}
};

class football :public AbstractProduct{
public:
	football(){};
	~football(){};
private:
	void dpname(){
		cout << "im football" << endl;
	}
	void play(){
		cout << "play football" << endl;
	}
};

//抽象工厂
class AbstractFactory{
public:
	AbstractFactory(){};
	virtual ~AbstractFactory(){};
	virtual AbstractProduct* getinstance() = 0;
};

class BasketballFactory:public AbstractFactory{
private:
	AbstractProduct* getinstance(){
		return new basketball();
	}
};

class FootballFactory :public AbstractFactory{
private:
	AbstractProduct* getinstance(){
		return new football();
	}
};

void main(){
	AbstractFactory* a = new basketFactory();
	Abstractball* b = a->getinstance();
	b->display();
	getchar();
}