两个程序，要求用消息队列，实现聊天程序，每次发言后自动在后面增加当前系统时间；同时增加结束字符，比如最后输入“88”后结束进程；共享内存-Two procedures, requirements, message queues, chat program, the current system time is automatically added after each speech　while increasing the end of the character, such as the last input "88" after the end of the process　shared memory