class Entity
{
private:
    int x,y,image;

public:
    int GetX() const { return x; }
    int GetY() const { return y; }
    int GetImage() const { return image; }
};

void AnimateAndDraw(GraphicsDevice &g,Entity &e)
{
    int x=e.GetX();
    int y=e.GetY();

    int i=e.GetImage();

    i=UpdateAnimationSomehow(i); // or whatever

    g.Draw(x,y,i);
}

class Animation
{
public:
    void Update();
    int CurrentImage();
};

class Entity // pure virtual interface describing actions
{
public:
    virtual void Update()=0;
    virtual void Render(GraphicsDevice &g)=0;
};

class Robber : public Entity
{
private:
    float x,y;
    Animation a;

public:
    virtual void Update(){ a.Update(); }
    virtual void Render(GraphcisDevice &g){ g.Draw(x,y,a.CurrentImage()); }
};

typedef std::vector<Entity*> Entities;
Entities e;

void Init()
{
    e.push_back(new Robber());
}

void Update()
{
    for(Entities::iterator i=e.begin();i!=e.end();++i) i->Update();
}

void Render(GraphicsDevice &g)
{
    for(Entities::iterator i=e.begin();i!=e.end();++i) i->Render(g);
}