抽象工厂模式

class Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"Fruit"<<std::endl;
    }
};

class FruitFactory
{
public:
    virtual Fruit *getBanana()
    {
        std::cout<<"FruitFactory:getBanana"<<std::endl;
        return NULL;
    }

    virtual Fruit *getApple()
    {
        std::cout<<"FruitFactory:getApple"<<std::endl;
        return NULL;
    }

    virtual Fruit *getMg()
    {
        std::cout<<"FruitFactory:getMg"<<std::endl;
        return NULL;
    }
};

class SouthBanana : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是SouthBanana"<<std::endl;
    }
};

class SouthApple : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是SouthApple"<<std::endl;
    }
};

class SouthMg : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是SouthMg"<<std::endl;
    }
};


class NorthBanana : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是NorthBanana"<<std::endl;
    }
};

class NorthApple : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是NorthApple"<<std::endl;
    }
};

class NorthMg : public Fruit
{
public:
    virtual void sayName()
    {
        std::cout<<"我是NorthMg"<<std::endl;
    }
};

//NorthFactory
class NorthFactory :public FruitFactory
{
public:
    virtual Fruit *getBanana()
    {
        return new NorthBanana();
    }

    virtual Fruit *getApple()
    {
        return new NorthApple();
    }

    virtual Fruit *getMg()
    {
        return new NorthMg();
    }
};

//SouthFactory
class SouthFactory :public FruitFactory
{
public:
    virtual Fruit *getBanana()
    {
        return new SouthBanana();
    }

    virtual Fruit *getApple()
    {
        return new SouthApple();
    }

    virtual Fruit *getMg()
    {
        return new SouthMg();
    }
};