Two-way communication in socket programming using C

Question

I have a small doubt in socket programming. i am able to send my data from client to server and my server processes the data. The o/p of the data processed, I want to send b

Answer 1

(Late answer, so mainly for anyone else who comes here looking for help)

I recently put up an example client/server application that closely follows Beej's Guide to Network Programming (which was also recommended by Kerrek SB in his answer). If you're looking for a simple working example of client/server communication, maybe this will help:

https://github.com/countvajhula/dummyclientserver

In particular, no, your client does not need to set up a separate listening socket to receive data from the server -- after the server has accepted the connection from the client, the server can simply send data back to the client on the same socket.