RE: Trivia: How many lines of code are allowed in an RPG Program?

haven't fully tested.  But this proc should be able to add the zip as you 
defined:

     P getNextCANZip   B
     D                 PI             6A
     D  piInput                       6A   varying value

      * constants
     D myNums          C                   const('0123456789')
     D myAlpha         C                   const('ABCDEFGHIJKLMNOPQRSTUVWXYZ')

      * local variables
     D myIx            s              5  0
     D myPos           s              5  0
     D myNumAdd        s               N   inz(*on)
     D                 DS
     D  retValue                      6
     D  myOutput                      1A   dim(6) overlay(retValue)

     C                   eval      retValue = piInput

     C                   for       myIx = %len(piInput) downto 1
      *   find the current value
     C                   if        myNumAdd = *on
     C                   eval      myPos = %scan(myoutput(myIx) :myNums)
     C                   else
     C                   eval      myPos = %scan(myOutput(myIx) :myAlpha)
     C                   endif

     C                   select
      * invalid char passed
     C                   when      myPos = 0
     C                   return    *hival

      * overflow on numeric add
     C                   when      myNumAdd and myPos = 10
     C                   eval      myOutput(myIx) = '0'

      * overflow on alpha add
     C                   when      not myNumAdd and myPos = 26
     C                   eval      myOutput(myIx) = 'A'

     C                   other
     C                   if        myNumAdd
     C                   eval      myOutput(myIx) = %subst(myNums :myPos+1 :1)
     C                   else
     C                   eval      myOutput(myIx) = %subst(myAlpha :myPos+1 :1)
     C                   endif
     C                   leave
     C                   endsl
     C
     C                   eval      myNumAdd = not myNumAdd
     C                   endfor


     C                   RETURN    retValue
     P getNextCANZip   E


> ------------------------------
> 
> message: 5
> date: Tue, 19 Oct 2004 13:12:00 -0500
> from: fkany@xxxxxxxxxxxxxxxxxx
> subject: RE: Trivia: How many lines of code are allowed in an RPG
>       Program?
> 
> If someone else has a better way, be my guest, I'm
> open to ideas.