QSORT(3F)           RISC/os Reference Manual            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 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 func-
     tion 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)



















                        Printed 11/19/92                   Page 1