#include<stdio.h>
#include<iostream>

using namespace std;

class Product{
public:
  virtual void run() = 0;
};

class ProductA : public Product{
  void run(){cout<<"Product A"<<endl;};
};

class ProductB : public Product{
  void run(){cout<<"Product B"<<endl;};
};

class Factory{
public:
  Factory(){};
  Product * create(int type){
    switch(type){
      case 0 : product = new ProductA;
                break;
      case 1 : product = new ProductB;
                break;
      default : cout<<"other products"<<endl;
    }
    return product;
  };
private:
  Product * product;
};


int main(){
  Factory * f = new Factory;
  Product * d = f->create(0);
  d->run();
  d = f->create(1);
  d->run();
  d = f->create(2);
  return 0;
}