public void start()
{
Order order = new Order();
Return:
order.Menu();
string task = Console.ReadLine();
int num = Int32.Parse(task);
switch (num)
{
case 1:
Input();
goto Return;
case 2:
Console.WriteLine("请输入要删除的序号：");
string del = Console.ReadLine();
int delnum = Int32.Parse(task);
Delete(delnum);
goto Return;
}
}
