I think Florian Fischer wrote: > > Actually, in my program, ?a and ?c come from shadow facts and the > variables are bound to variables declared long in the underlying Java > object. They are the arrival time and current time in milliseconds. > Anyway, being declared long, I would expect the behaviour of ?a and ?c > to be like in the second case. But they behave like in the first case.
Longs aren't fully supported in Jess 6; things that look like long literals are converted to RU.FLOAT (a double) or RU.INTEGER (an int) in various contexts; you can't do math directly on RU.LONGs. The only thing you can really use them for is passing them to Java functions, where they'll make it through unchanged. Obviously in the one case, you're seeing the effect of truncation on conversion to INTEGER. In contrast, in Jess 7, RU.LONG *is* fully supported. Long literals are parsed correctly as longs, long arithmetic is done natively, and on that version, you get the same answer for all four computations. There's little reason for anyone to be targetting new applications to Jess 6 at this point. --------------------------------------------------------- Ernest Friedman-Hill Advanced Software Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
