//工厂模式
public static TicKet CreateTicket(string type, ScheduleItem item, Seat seat, string customerName, double disCount) //买票
{
TicKet t = null;
switch (type)
{
case "TicKet":
t = new TicKet(item, seat);
break;
case "FreeTicKet":
t = new FreeTicket(item, seat, customerName);
break;
case "StuTicKet":
t = new StudentTicket(item, seat, disCount);
break;
}
return(t);
}