class Motorsykkel {

    private static int teller = 0;

    private int kilometerstand;
    private String regNr;
    private int prodNr;

    Motorsykkel(String registreringsNr) {
        kilometerstand = 0;
        regNr = registreringsNr;
        prodNr = teller;
        teller++;
    }

    public int hentKilometerstand() {
        return kilometerstand;
    }

    public int hentProdNr() {
        return prodNr;
    }

    public void kjoer(int antallKilometer) {
        kilometerstand += antallKilometer;
    }
}