要求完成以下功能：

（1）系统以菜单方式工作

（2）查询，根据输入时间，输出机位信息。

（3）机位预定，根据输入的时间查询是否有空机位，若有则预约，若无则提供最近的时间段，另：若用户在非空时间上机，则将用户信息列入等待列表。

（4）退出预定，根据输入的时间，机器号撤销该事件的预定！

（5）查询是否有等待信息，若有则提供最优解决方案（等待时间尽量短），若无则显示提示信息。

-Accomplish the following functions:

(1) system to work the way the menu

(2) query, depending on the input time, the output of flight information.

(3) flight reservation, depending on the time the query entered for empty seats, if you make an appointment, if not then provide the most recent period, and the other: if the user on the non-inclusion of air time machine, it will wait for user information list.

(4) Exit reservations, according to the input of the time, machine number revoke Book this event!

(5) whether the query has to wait for information, if it is to provide the best solutions (wait time as short as possible), if not then display message