#include <iostream>
#include <list>
#include <string>
class Entity
{public:
    std::string name = "Entity";
    virtual void update()
    {
        std::cout << "Metod Entity" << 'n';
    }
};

class MovingPlatform:public Entity
{
public:
    void update()
    {
        std::cout << "Metod MovingPlatform"<<'n';
    }
};

int main()
{
    std::list <Entity> layers;
    Entity a;
    MovingPlatform b; b.name = "MovingPlatform";
    layers.emplace_back(a); layers.emplace_back(b);

    for (auto it = layers.begin(); it != layers.end(); ++it)
    {
        std::cout << it->name << ": "; it->update();
    }

    system("pause");
}

Entity: Metod Entity
MovingPlatform: Metod Entity