public StudentTicket(ScheduleItem scheduleItem, Seat seat, double discount) : base(scheduleItem, seat)
{
this.Discount = discount;
this.Price = CalcPrice();
}
public Ticket(ScheduleItem scheduleItem, Seat seat)
{
this.ScheduleItem = scheduleItem;
this.Seat = seat;
this.Price = CalcPrice();
}