Inform 6 is version 6 of a compiler meant for writing adventure games 
for the  so-called "Z-machine" created by Infocom.  It seems to be 
more object oriented than the original sent to me. 
<a href=http://www.doggysoft.co.uk/inform>Click here</a> for more information.

! -----------------------------------------------------------------------------
! 99 Bottles of Beer on the Wall, Inform 6 version.
!
! Torbjörn Andersson, (d91tan@Student.DoCS.UU.SE), August 1997
! -----------------------------------------------------------------------------

Constant NUM_BOTTLES	99;

Object wall
  private
	bottles_left