#include <iostream>

// Product

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

class ConcreteProduct :public Product {
public:
 ConcreteProduct() {
 std::cout << "ConcreteProduct..." << std::endl;
 }
 void say() {
 std::cout << "ConcreteProduct Say..." << std::endl;
 }
 ~ConcreteProduct() { }
};

// Factory

class Factory {
public:
 virtual Product* CreateProduct() = 0;
 virtual ~Factory() { }
protected:
 Factory() { }
};

class ConcreteFactory :public Factory {
public:
 ConcreteFactory() {
 std::cout << "ConcreteFactory..." << std::endl;
 }

 ~ConcreteFactory() {

 }

 Product* CreateProduct() {
 return new ConcreteProduct();
 }

};

// Test

int main() {
 Factory *factory = new ConcreteFactory();
 Product *product = factory->CreateProduct();
 product->say();

 delete factory;
 delete product;

 return 0;
}