qsort(3f) — Subroutines
Digital
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 or integer∗2 function that will determine the sorting order. You must declare compar as external with the "external" statement to be recognized as a function. This function will be called with 2 arguments 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