内部含有Windows的消息队列的，是一个短信答题的模拟程序。-contained within the Windows message queue, is a short message to answer the simulation program.

离散时间堆栈系统 The queue can store up to five packets. All packets are processed on a first come – first served basis. Assume that when a packet is serviced all other packets in a queue (if any) are shifted instantaneously towards the output. Each slot d