#include <iostream>

#include <cassert>

using namespace std;

#include "widgets2.h"

int main()
{

    Widget w1;

    assert(w1.getId()==1);

    Wodget w2;

    assert(w2.getId()==2);
    assert(w2.getKnobs()==0);
    w2.addKnob();
    assert(w2.getKnobs()==1);
    w2.addKnob();
    assert(w2.getKnobs()==2);

    return 0;
}