##-
# Author: Brian Tiffin
# Dedicated to the public domain
#
# Date: August 2016
# Modified: 2016-10-03/23:13-0400
##+
#
# preproc-error, demonstrate $error preprocessor directive
#
procedure main()
$ifdef _MSDOS
    write("MSDOS available, GetSpace and FreeSpace")
    A := GetSpace(64) | stop("GetSpace failed")
    FreeSpace(A)
$else
$error MSDOS features required for this program
$endif
end