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#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;

}