public ClassRoom(Pupil p1, Pupil p2) { arr = new Pupil[] { p1, p2 }; }
public ClassRoom(Pupil p1, Pupil p2, Pupil p3, Pupil p4) { arr = new Pupil[] { p1, p2, p3, p4 }; }
public ClassRoom(Pupil p1, Pupil p2, Pupil p3) { arr = new Pupil[] { p1, p2, p3 }; }