Question on printf()

[jian at kuhub.cc.ukans.edu]

Hi folks, I have one simple question about printf() on Utrix. Following is the
program that I question about:

#define <stdio.h>
#define <signal.h>

main()
{ 
  ....
  
  alarm(60);

  ....
  
  signal(SIGALRM, display);

  ....

} /* main() */

display()
{ 
   printf("\n\n\nEnter Command -> ");
   alarm(60);
}

I don't know why the printf() only prints three linefeeds and the "Enter 
Command -> " only shows up on every next call to display. It seems to me
that if I don't do any I/O and linefeed after printf(), the printf() does 
not print the string argument on the standard output. Why? How can I avoid
this problem? I very much appreciate any helps.

Jian Li 
jian at kuhub.cc.ukans.edu