class Product{public:    virtual ~Product() {}    virtual void DoSomething()=0;};class ProductA : public Product{public:    ProductA() {}    ~ProductA() {}    virtual void DoSomething();};class ProductB : public Product{public:    ProductB() {}    ~ProductB() {}    virtual void DoSomething();};class ProductC : public Product{public:    ProductC() {}    ~ProductC() {}    virtual void DoSomething();};void ProductA::DoSomething(){    cout<<"ProductA::DoSomething"<
     
      CreateProduct();    pProduct->DoSomething();    DESTROY(pFactory);    DESTROY(pProduct);    pFactory = new FactoryB;    pProduct = pFactory->CreateProduct();    pProduct->DoSomething();    DESTROY(pFactory);    DESTROY(pProduct);    pFactory = new FactoryC;    pProduct = pFactory->CreateProduct();    pProduct->DoSomething();    DESTROY(pFactory);    DESTROY(pProduct);    return 0;}