C + + Design pattern for abstract Factory mode

Abstract Factory: Provides an interface to create a series of related or interdependent objects without specifying their specific classes.

Pattern implementation:

[Code]//create productaclass producta{public:virtual void Show () = 0;};    Class Producta1:public Producta{public:void Show () {std::cout << "I m producta1\n";    }};class producta2:public producta{public:void Show () {std::cout << "I m producta2\n"; }};//create productbclass productb{public:virtual void Show () = 0;};    Class Productb1:public Productb{public:void Show () {std::cout << "I m productb1\n";    }};class productb2:public productb{public:void Show () {std::cout << "I m productb2\n";    }};class factory{public:virtual producta *createproducta () = 0; Virtual PRODUCTB *CREATEPRODUCTB () = 0;};    Class Factory1:public Factory{public:producta *createproducta () {return new ProductA1 ();    } PRODUCTB *CREATEPRODUCTB () {return new ProductB1 ();    }};class factory2:public factory{public:producta *createproducta () {return new ProductA2 ();     } PRODUCTB *CREATEPRODUCTB () {   return new ProductB2 ();        }};template <typename t>void del (t* obj) {if (obj! = NULL) {Delete obj;    obj = NULL; }}

Client:

[Code]int Main () {    Factory *factoryobj1 = new Factory1 ();    ProductA *productobja1 = Factoryobj1->createproducta ();    PRODUCTB *productobjb1 = FACTORYOBJ1->CREATEPRODUCTB ();    Productobja1->show ();  Output:i ' m ProductA1    productobjb1->show ();  Output:i ' m ProductB1    Factory *factoryobj2 = new Factory2 ();    ProductA *productobja2 = Factoryobj2->createproducta ();    PRODUCTB *productobjb2 = FACTORYOBJ2->CREATEPRODUCTB ();    Productobja2->show ();  Output:i ' m ProductA2    productobjb2->show ();  Output:i ' m ProductB2    del (productObjB2);    Del (productObjA2);    Del (FACTORYOBJ2);    Del (productObjB1);    Del (productObjA1);    Del (FACTORYOBJ1);    return 0;}

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