Wednesday, July 3, 2013

Simple Chat Program in C (Part 3)


Read Part 2 : The Client

Sample Execution:

$ gcc server.c -o server -lpthread
$ gcc client.c -o client -lpthread

Now we run the server program and several client programs

Each client should first connect to the server by typing in:

login [alias]
Here [alias] is optional, if it is not mentioned, the name will be set as Anonymous.

The name can be changed by the command:

alias [new_name]
After this, you alias will be changed to the new name you have given.

To send a message to everyone connected at the moment:

send [message]

To send a message to a specific alias:

whisp [user_alias] [message]
If the target alias is not active at that moment, message will not be sent anywhere

You can disconnect from the server by typing:

logout
You can again reconnect by using the login command

You can terminate the client by typing:

exit

This is pretty much of it. Basically this is good for your C lab assignments regarding TCP / socket based chat clients. Here is a screen shot from my computer:

Good luck!


12 comments:

  1. hi zobayer, i learn coding from your spoj solutions :)

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  2. I Know It's not the place to ask you this question here. But i really have a great problem in one of my project where i have to print a text file(*.txt) by a printer through C coding. Can you provide me some reference or instruction ?

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    Replies
    1. see fopen(), fwrite(), fprintf() etc from www.cplusplus.com
      for low level operations open() and read() / write() can help

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    2. Brother i am not asking you about file i/o system. May be i could not ask you the question properly at previous time. I want to access a peripheral or USB port Or may be the driver file in the system of the OS(windows) of my pc so that i can give instruction to the output device (such as printer) to print a text(*.txt) file. I really need some reference.

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    3. oh sorry, for windows, can't help, however in linux its pretty straight forward. you can get plenty of results by googling... good luck.

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  3. hey bro , can u pls expalain me the solution of LIS2 in spoj

    http://www.spoj.com/problems/LIS2/
    Waiting for your reply

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  4. Hi zobayer, l learn coding from ur spoj solution. but it seems that you have removed ur solution from GitHub. Have u posted them on other site?

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    Replies
    1. Hi, no, I didn't post them in any other site, I have taken those away on request, because people were abusing them too much. There are problems where 90% of the top 30 submissions were exactly my solutions. So I think instead of taking help, people are using those as a means of racking up their score. I also got a mail from spoj admin Ɓukasz Kuszner regarding this issue. I hope you will understand. If you really need to see a solution that I have solved, send me an email, I will send you the source code if I feel appropriate.
      Thanks for understanding :)

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  5. Hi All,

    Can Any one provide the Chat pgm in C-Language (Ex: Happening b/w two users ), thanks in advance and great appreciate if u provide the solution!

    Thanks & Regards,
    Ravi k.

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  6. thanks god i finally finish my IT homework :D thank you a lot !!!

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  7. After exit command in /.server, it exits well but when I rewrite ./server again it shows this "bind() failed..." in terminal. Can you help me please ???

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  8. That is because the port is still active with the process. Make sure you release the port. You can check which ports are currently in use by using netstat command.

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