模拟银行的叫号机。在程序运行过程中使用文本菜单供用户选择，选择1则模拟储户按下叫号机取叫号纸（即入队列），选择2则模拟银行工作人员按下叫号机，请取得相应号数的储户到前台办理业务（即出队列）。叫号机的号数从1号开始往上递增。

-Simulation machine called the number of banks. The program is running for the user to choose a text menu, select a machine called the number Analog depositors Press called the number to take the paper (that is, into the queue), select the two simulated bank staff called the number press machine, obtain the corresponding numbers depositors to the front for the business (ie, the queue). Number of machines called the numbers increase from 1 upwards.