class Bil {
	private int kilometerstand;
	private int bensin;
	private final int tankStorrelse;
	private final int kmPerLiter;

	public void kjorTur(int km) throws Exception {
		if (km > hentMaksDistanse()) {
			throw new Exception("Du har ikke nok bensin..");
		} else {
			kilometerstand += km;
			bensin -= km / kmPerLiter;
		}
	}

	public void refuel(double liter) throws Exception {
		if (bensin + liter > tankStorrelse)
			throw new Exception("Tanken din har ikke plass til saa mye benin.");
		else
			bensin += liter;
	}

	public double hentMaksDistanse() {
		return (double)bensin * (double)kmPerLiter;
	}

	public int hentKilometerstand() {
		return kilometerstand;
	}

	Bil(int tankStorrelse, int kmPerLiter) {
		this.tankStorrelse = tankStorrelse;
		this.kmPerLiter = kmPerLiter;
		this.bensin = tankStorrelse;
	}
}