Fabrica

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#include <iostream>
#include <unordered_map>
#include <cassert>

class IProduct
{
    public:
        virtual void Release() = 0;
};

class IWorkShop
{
    public:
        virtual IProduct* Generate() = 0;
};

class Vehicle{};

class Car final : public Vehicle, public IProduct{ public: virtual void Release() override { std::cout << "Создана Машина \n"; } };
class Tank final : public Vehicle, public IProduct{ public: virtual void Release() override {std::cout << "Создан Танк \n";} };
class Scooter final : public Vehicle, public IProduct{ public: virtual void Release() override {std::cout << "Создан Скутер \n";} };
class Bike final : public Vehicle, public IProduct{ public: virtual void Release() override {std::cout << "Создана Байк \n";} };
class Boat final : public Vehicle, public IProduct{ public: virtual void Release() override {std::cout << "Создана Лодка \n";} };

class CarWorkShop : public IWorkShop
{
     virtual IProduct* Generate() override { return new Car(); }
};
class TankWorkShop : public IWorkShop
{
    virtual IProduct* Generate() override { return new Tank(); }
};
class ScooterWorkShop : public IWorkShop
{
    virtual IProduct* Generate() override { return new Scooter(); }
};
class BikeWorkShop : public IWorkShop
{
    virtual IProduct* Generate() override { return new Bike(); }
};
class BoatWorkShop : public IWorkShop
{
    virtual IProduct* Generate() override { return new Boat(); }
};

class BaseWorkShop // Можно было сделать статичным классом со статичными методами, но тем не менее я сделал так.
{
    private:
        std::unordered_map<int, IWorkShop*> WorkShops;

    public:

    BaseWorkShop()
    {
        WorkShops[0] = new CarWorkShop();
        WorkShops[1] = new TankWorkShop();
        WorkShops[2] = new ScooterWorkShop();
        WorkShops[3] = new BikeWorkShop();
        WorkShops[4] = new BoatWorkShop();
    }

    ~BaseWorkShop()
    {
        for (auto& pair : WorkShops) {
            delete pair.second;
            pair.second = nullptr;
        }
        WorkShops.clear();
    }

    IProduct* GenerateProductById(int id)
    {

        assert(id >= 0 && id <= WorkShops.size() && WorkShops.at(id) != nullptr); // Если не выполняются эти условия, программа дальше не идет.
        return WorkShops[id]->Generate();
    }



};




int main()
{
    BaseWorkShop* BigShop = new BaseWorkShop();

    Car* car = dynamic_cast<Car*>( BigShop->GenerateProductById(0) );
    car->Release();

    delete BigShop;

    return 0;
}