redhat man page for qsort

QSORT(3)						     Linux Programmer's Manual							  QSORT(3)

NAME
       qsort - sorts an array

SYNOPSIS
       #include <stdlib.h>

       void qsort(void *base, size_t nmemb, size_t size,
		  int(*compar)(const void *, const void *));

DESCRIPTION
       The qsort() function sorts an array with nmemb elements of size size.  The base argument points to the start of the array.

       The  contents  of the array are sorted in ascending order according to a comparison function pointed to by compar, which is called with two
       arguments that point to the objects being compared.

       The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be  respec-
       tively less than, equal to, or greater than the second.	If two members compare as equal, their order in the sorted array is undefined.

RETURN VALUE
       The qsort() function returns no value.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       sort(1)

GNU
								    1993-03-29								  QSORT(3)