write a program for every 10 seconds tell the number of users logged in .

write a program for every 10 seconds tell the number of users logged in .

main()

{

  int pid;

pid=fork();

if (pid==0)

{

    for(;;)

{

  sleep(10);

printf(“ the number of users logged in are :”);

system(“who | wc –l”);

}

}

}