4. Basic Knowledge: "server listening port" application to implement functions

%. Start a listening port % B. the client can send data % C. the server receives the data and performs the corresponding operation. After the operation is completed, the result is sent back to the client % d. client-side connection, server-side cleanup of the data module % server_manager.erl, code file, on the website: GitHub 1. listen to Port 2 after startup. connect the client to the server 3. the data sent by the client is different, and the corresponding operations on the server are also different. 4. the server logic is faulty. If the client sends other data, the server cannot continue to use it.

4. Basic Knowledge: "server listening port" application to implement functions