abstract class Mitarbeiter{
   int    personalNummer;
   String name;
   String vorname;

   abstract void print();
   void setPersonalNummer(int i){personalNummer=i;}
   void setName(String s){name=s;}
   void setVorname(String s){vorname=s;}

   int getPersonalNummer(){return personalNummer;}
   String getName(){return name;}
   String getVorname(){return vorname;}
}