Description:
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Use UDP to create a server: client and server each process
1) UDP server, you can accept the information sent each way, after receiving the message, add confirmation characters (ack) back to the corresponding user
If client1 sends helloworld to the server
When the server receives it, it returns getMsgACK: helloworld
2) Client1 will record all the information they sent, and confirm whether the server received,
Which is receiving client server1 at the same time the news sent to the analysis of information GetMsgACK: (strtok)
Confirm the server receives, the information the list issued to delete
3) If the message list has a content, every 1 second prompts whether to re-send the message alarm ()
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File list (Check if you may need any files):
server1.c
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