c programming logic

Question

I am trying to build a logic in c to come out from an infinite loop when input is taken from the user otherwise continue looping. But the loop get halted and my program starts waiting for the input. So, friends can you help me and suggest me some idea to implement the logic. The os is linux code starts waiting at if conditon.

while(1) {
     recv(sock,&data,sizeof(data),0);
     printf("\nthe recieved data from the server is: %d\n",data);
     fflush(stdout);

     if (scanf("%c",&control)==1 && control=='b')
     {
         send(sock,&control,1,0);
         break;
     }
     else continue;
}

Its hard to understand the real question without seeing the code. — Martin York, Oct 24 '11 at 06:26
What operating system? How to do a non-blocking read for user input depends on your platform. — indiv, Oct 24 '11 at 06:26
what is the code for your program. How can you expect help without showing what are you doing. — krammer, Oct 24 '11 at 06:28
Please edit your question to add the code. And make sure to format it so it displays all nice and fixed-width. — Chris Lutz, Oct 24 '11 at 06:31

score 0 · Accepted Answer · answered Oct 24 '11 at 06:27

0

You're probably using a blocking function to obtain user input, so the program will halt on that function until the user inputs something.

answered Oct 24 '11 at 06:27

Luchian Grigore

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can u suggest me a non-blocking function for user input – tod Oct 24 '11 at 06:41
You could wait for input on a seperate thread. Also, take a look at this link: http://cc.byexamples.com/2007/04/08/non-blocking-user-input-in-loop-without-ncurses/ – Luchian Grigore Oct 24 '11 at 06:43
http://stackoverflow.com/questions/448944/c-non-blocking-keyboard-input – Luchian Grigore Oct 24 '11 at 06:43

c programming logic

1 Answers1