public void doJoinAndExit(string arg)
{
IClassRoomUser person = factory.createClassRoomUser(arg);
person.Join();
person.Exit();
}
public void doExit(string arg0, string arg1)
{
AbstractClassRoomUserFactory factory = new OrdinaryClassRoomUserFactory();
if (arg0 == "International")
{
factory = new InternationalClassRoomUserFactory();
}
IClassRoomUser person = factory.createClassRoomUser(arg1);
person.Exit();
}