public class Masterstudent extends Student {
  private Person veileder;

  public Masterstudent(String navn, int alder){
    super(navn, alder);
  }
  public Masterstudent(String navn, int alder, Person veil) {
    super(navn, alder);
    this.veileder = veil;
  }

  @Override
  public void registrer(Emne emne){
    emner.add(emne);
  }

   @Override
   public String toString(){
     return super.toString() + "\n - Veileder: " + veileder;
   }
}