public class AmerikanskBank implements Betalingslosning, Fremmedvaluta {
    
    private double balanseIUsd = 0;
    private static final double USD_KURS = 7.90;

    @Override
    public double konverterFraNok(double antallNok) {
        return antallNok / USD_KURS;
    }

    @Override
    public void innskudd(double antallNok) {

        balanseIUsd = konverterFraNok(antallNok);

    }
    @Override
    public boolean uttak(double antallNok) {
        if (balanseIUsd >= konverterFraNok(antallNok)) {
            balanseIUsd -= konverterFraNok(antallNok);
            return true;
        }

        return false;
    }
    @Override
    public void balanse() {
        System.out.println("Balanse: " + balanseIUsd + " USD.");
    }
}