SLASRT(3f)

NAME
SLASRT - number in D in increasing order (if ID = 'I') or in decreasing order (if ID = 'D' )

SYNOPSIS

SUBROUTINE SLASRT(
    ID, N, D, INFO )

CHARACTER
    ID

INTEGER
    INFO, N

REAL
    D( * )

PURPOSE
Sort the numbers in D in increasing order (if ID = 'I') or in decreasing order (if ID = 'D' ). Use Quick Sort, reverting to Insertion sort on arrays of
size <= 20. Dimension of STACK limits N to about 2**32.

ARGUMENTS

ID      (input) CHARACTER*1
    = 'I': sort D in increasing order;
    = 'D': sort D in decreasing order.

N       (input) INTEGER
    The length of the array D.

D       (input/output) REAL array, dimension (N)
    On entry, the array to be sorted. On exit, D has been sorted into increasing order (D(1) <= ... <= D(N) ) or into decreasing order (D(1) >= ... >= D(N) ), depending on ID.

INFO    (output) INTEGER
    = 0: successful exit
    < 0: if INFO = -i, the i-th argument had an illegal value