bsd man page for qsort

QSORT(3F)																 QSORT(3F)

NAME
       qsort - quick sort

SYNOPSIS
       subroutine qsort (array, len, isize, compar)
       external compar
       integer*2 compar

DESCRIPTION
       One  dimensional  array	contains the elements to be sorted.  len is the number of elements in the array.  isize is the size of an element,
       typically -

	    4 for integer and real
	    8 for double precision or complex
	    16 for double complex
	    (length of character object) for character arrays

       Compar is the name of a user supplied integer*2 function that will determine the sorting order.	This function will be called with 2  argu-
       ments that will be elements of array.  The function must return -

	    negative if arg 1 is considered to precede arg 2
	    zero if arg 1 is equivalent to arg 2
	    positive if arg 1 is considered to follow arg 2

       On return, the elements of array will be sorted.

FILES
       /usr/lib/libU77.a

SEE ALSO
       qsort(3)

4.2 Berkeley Distribution					   May 15, 1985 							 QSORT(3F)