TYPE* dynamic_cast<TYPE*> (object);

#include <string>

class Location
{
     public: virtual ~Location() { }

     public: std::string m_Street;
     public: std::string m_City;
};

class Shop : public Location
{
     public: virtual ~Shop() { }

     public: std::string m_ShopName;
};

int main()
{
     Location* pL = new Shop();

     Shop* pS = dynamic_cast<Shop*> (pL); // Преобразование указателя класса Location в класс Shop
     if (pS != NULL)
     {
          pS->m_ShopName = "Booking shop";
     }
}