public class Warenlager {
  public Warenbestand[] bestand;
  
  public Warenlager() {
    bestand = new Warenbestand[10];
    
    bestand[0] = new Warenbestand(
      new Ware("Ayran", 1.99), 99
    );
    bestand[1] = new Warenbestand(
      new Ware("Schokoriegel", 1.30), 70
    );
    bestand[2] = new Warenbestand(
      new Ware("stifte", .99), 53
    );
    bestand[3] = new Warenbestand(
      new Ware("Briefmarken", .85), 490
    );
    bestand[4] = new Warenbestand(
      new Ware("Kaugummis", 2.49), 30
    );
    bestand[5] = new Warenbestand(
      new Ware("Gummibärchen", 3.00), 10
    );
  }
  
  public String toString() {
    int n; String r = "";
    for (n = 0; n < bestand.length; n++) {
      if ( bestand[n] != null ) {
        r += bestand[n] + "\n";
      }
    }
    r += String.format("%52.2f\n", wert());
    return r;
  }
  
  public double wert() {
    int n; double r = 0.0;
    for (n = 0; n < bestand.length; n++) {
      if ( bestand[n] != null ) {
        r += bestand[n].wert();
      }
    }
    return r;
  }
}