How to separate numbers in three-digit groups in C

[Hopelessly in love w/Donna Reed]

In article <1991Jun24.134512.27162 at leland.Stanford.EDU> dkeisen at leland.Stanford.EDU (Dave Eisen) writes:
>In article <12192 at hub.ucsb.edu> angst at cs.ucsb.edu (Hopelessly in love w/Donna Reed) writes:
>>This function will work.  It assumes the number is contained in a string
>>(which you can do by using sprintf()) --
>>
>
>No it won't. It bombs on -123 for example.

True, my solution doesn't work for negative numbers.  

Add the following as the first line of the function:

	if (s && *s == '-') {
	    putchar ('-');
	    s++;
	}

-d

"Let the fools have their tartar sauce."	|          Dave Stein
  		        - Mr. Burns		|       angst at cs.ucsb.edu
						|    angst%cs at ucsbuxa.bitnet