工厂模式

#include <cstdlib>
#include <iostream>
using namespace std;

class Product
{
public:
  virtual ~Product(){cout<<"Product 基类析构"<<endl;}
  virtual void Do() = 0;
};
class Product1:public Product
{
public:
  virtual ~Product1(){cout<<"Product1 析构"<<endl;}
  virtual void Do(){cout<<"I am Product1"<<endl;}
};
class Product2:public Product
{
public:
  virtual ~Product2(){cout<<"Product2 析构"<<endl;}
  virtual void Do(){cout<<"I am Product2"<<endl;}
};
/////////////////////////////////
class Factory
{
public:
  virtual ~Factory(){cout<<"Factory 基类析构"<<endl;}
  virtual Product* GetProduct() = 0;
};
class Concrete1Factory:public Factory
{
public:
  virtual ~Concrete1Factory(){}
  virtual Product* GetProduct(){return new Product1;}
};
class Concrete2Factory:public Factory
{
public:
  virtual ~Concrete2Factory(){}
  virtual Product* GetProduct(){return new Product2;}
};
///////////////////////////////////////
void UseProduct(Factory* fac)
{
     Product* pro = fac->GetProduct();
     pro->Do();
     delete pro;
}
int main(int argc, char *argv[])
{
    Factory* Fac = new  Concrete1Factory;
    UseProduct(Fac);
    delete Fac;
    Fac = new  Concrete2Factory;
    UseProduct(Fac);
    delete Fac;
    system("PAUSE");
    return EXIT_SUCCESS;
}