public class Kasse {
  private double wert;
  private Warenlager lager;
  
  public Kasse(Warenlager l) {
    lager = l;
    wert = 0.0;
  }
  public Kasse(Warenlager l, double w ) {
    lager = l;
    wert = w;
  }
  
  public void verkauf() {
    int choice = -1;
    while (true){
      System.out.print(
        listLager() +
        "0. Verkauf abschließen\n"
      );
      choice = Read.getInt("Ware: ");
      if ( choice == 0 ) {
        return;
      }
    }
  }
  
  private String listLager() {
    int n; String r = "";
    for (n = 0; n < lager.bestand.length; n++) {
      if ( lager.bestand[n] != null ) {
        r = r + (n + 1) + " " +
            lager.bestand[n].ware + "\n";
      }
    }
    return r;
  }

}