#ifndef WIDGETS_H
#define WIDGETS_H

class Widget
{
  private:
    int id;
    static int nextId;
  public:
    int getId()const  { return id; }
    Widget() { id=nextId++; }
};
int Widget::nextId = 1;

class Wodget: public Widget
{
  private:
    int knobs;
  public:
    Wodget(): Widget(), knobs(0) {}
    int getKnobs()const { return knobs ; }
    void addKnob(){ knobs++; }
};

#endif