C ++ timing of message transmission, chat similar, because it is the point, can be easily extended to a chat program, the program timer is added, can automatically send a message, the main program is divided into two subroutines, client and server, the CS structure.
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Timing messages can be done before consumers consumption after a specified time, to resolve some news production and consumption scenarios have the time window required, or by message triggers timed tasks scene, similar to the delay queue.