*DECK INDXC
      SUBROUTINE INDXC (I, IR, IDXC, NC)
C***BEGIN PROLOGUE  INDXC
C***SUBSIDIARY
C***PURPOSE  Subsidiary to BLKTRI
C***LIBRARY   SLATEC
C***TYPE      INTEGER (INDXC-I)
C***AUTHOR  (UNKNOWN)
C***SEE ALSO  BLKTRI
C***ROUTINES CALLED  (NONE)
C***COMMON BLOCKS    CBLKT
C***REVISION HISTORY  (YYMMDD)
C   801001  DATE WRITTEN
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900402  Added TYPE section.  (WRB)
C***END PROLOGUE  INDXC
      COMMON /CBLKT/  NPP        ,K          ,EPS        ,CNV        ,
     1                NM         ,NCMPLX     ,IK
C***FIRST EXECUTABLE STATEMENT  INDXC
      NC = 2**IR
      IDXC = I
      IF (IDXC+NC-1-NM) 102,102,101
  101 NC = 0
  102 RETURN
      END