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      Get next count value, from 1 up.


Calling Sequence

      c = get_count(tag)


      tag = Any text string (optional). in

Keyword Parameters


        FILE=file Name of count file to use (def=count_file.txt
          in current directory.
        /LAST return last count without incrementing.
        /ZERO zero counter for given tag. Does not return
          a count. Count for next normal call will be 1.
        SET=c set counter to given value for given tag. Does not
          return a count. Count for next normal call will be c+1.
        DIGITS=n Return an n digit string value (0 padded on left).
        /ZREF initial count returned starts at 0.


      c = Count corresponding to given tag. out
        Returned as a string.

Common Blocks


      Notes: this routine returns the number of times it has
        been called with the given tag. The counts are saved
        in a count file which defaults to count_file.txt in
        current directory. This is a simple text file and
        may be modifed. Useful for creating a series of
        related file names. Could use date2dn to generate
        a tag value. Use a unique tag for each purpose.

Modification History

      R. Sterner, 1995 Jul 6
      R. Sterner, 2002 Sep 25 --- Allowed set for new tags. Added DIGITS.
      R. Sterner, 2002 Dec 03 --- Was returning unformatted value for new.
      R. Sterner, 2002 Dec 03 --- Made tag optional.
      R. Sterner, 2003 Jan 06 --- Used file_search for IDL 5.5 on.
      R. Sterner, 2003 Mar 20 --- New keyword /LAST.
      H. Taylor, 2004 Jun 29 --- New keyword /ZEROREF
  Copyright (C) 1995, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.

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