#include <iostream>

using namespace std;

typedef enum ProductType {
    TypeA,
    TypeB
} PRODUCTTYPE;

class AbsProduct {
public :
    virtual void draw() = 0;
};

class ProductA : public AbsProduct{
public :
    virtual void draw() {
        cout << "ProductA" << endl;
    }
};

class ProductB : public AbsProduct{
public :
    virtual void draw() {
        cout << "ProductB" << endl;
    }
};

class SimpleFatory {
public :
    static AbsProduct * getProduct(PRODUCTTYPE type) {
        AbsProduct * product = NULL;
        if(type == TypeA) {
            product = new ProductA();
            // do some thing
        } else if(type == TypeB) {
            product = new ProductB();
            // do some thing
        }
        return product;
    }
};

int main() {
    AbsProduct * product1 = SimpleFatory::getProduct(TypeA);
    AbsProduct * product2 = SimpleFatory::getProduct(TypeB);

    if(product1 != NULL)
        product1->draw();
    if(product2 != NULL)
        product2->draw();

    delete product1;
    product1 = NULL;
    delete product2;
    product2 = NULL;

    return 0;
}