From: dewar@gnat.com (Robert Dewar)
Subject: Re: Decimal Floating point was RE: Information Systems Annex was RE: Dispatching and generics - language lawyer question
Date: 16 Aug 2002 08:29:50 -0700
Date: 2002-08-16T15:29:50+00:00 [thread overview]
Message-ID: <5ee5b646.0208160729.6b1e3a07@posting.google.com> (raw)
In-Reply-To: mailman.1029448502.10542.comp.lang.ada@ada.eu.org
"Robert C. Leif" <rleif@rleif.com> wrote in message news:<mailman.1029448502.10542.comp.lang.ada@ada.eu.org>...
> From: Bob Leif
> Since intermediate values in a calculation how a low
> frequency of being
> printed out, the simplest solution to digits is to leave
> it at a fixed
> value.
This is also incomprehensible in the Ada context. In PL/1
and in COBOL, the precision and scaling of intermediate
results is not explicit. In PL/1 there are implicit rules
which turn out to have very surprising effects, and are
generally considered a signal failure.
In COBOL, intermediate precision is implementation defined
and as a consequence most COBOL coding standards forbid the
use of COMPUTE, with the possible exception of
COMPUTE A = B ** C
since the exponentiation operator is only available in the
COMPUTE verb. But in this case there is no intermediate
result so all is well.
In Ada, we have a much better design where the programmer
is forced to specifically give the precision and scaling
of all intermediate results where an issue arises (addition
and subtraction do not present a problem, it is division
and multiplication that cause trouble).
So I don't understand your comment about intermediate
values in the context of Ada fixed-point.
next prev parent reply other threads:[~2002-08-16 15:29 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-24 5:33 Dispatching and generics - language lawyer question Grein, Christoph
2002-07-24 22:55 ` Robert A Duff
2002-07-25 15:46 ` Ben Brosgol
2002-07-29 20:38 ` Robert A Duff
2002-07-31 22:52 ` Dmitry A.Kazakov
2002-07-31 20:18 ` Robert A Duff
2002-08-02 1:15 ` Dmitry A.Kazakov
2002-08-01 16:30 ` Hyman Rosen
2002-08-02 23:42 ` Dmitry A.Kazakov
2002-08-02 15:49 ` Hyman Rosen
2002-08-02 17:48 ` Stephen Leake
2002-08-10 3:03 ` Warren W. Gay VE3WWG
2002-08-05 11:15 ` Dmitry A. Kazakov
2002-08-12 12:44 ` Robert Dewar
2002-08-13 2:00 ` Information Systems Annex was " Robert C. Leif
2002-08-13 8:17 ` Robert Dewar
2002-08-13 23:53 ` Information Systems Annex Robert C. Leif
2002-08-13 17:37 ` Information Systems Annex was RE: Dispatching and generics - language lawyer question Keith Thompson
2002-08-13 23:53 ` Robert C. Leif
2002-08-14 8:52 ` Keith Thompson
2002-08-14 21:53 ` Robert C. Leif
2002-08-15 9:31 ` Robert Dewar
2002-08-15 21:54 ` Decimal Floating point was " Robert C. Leif
2002-08-16 6:26 ` Keith Thompson
2002-08-16 16:26 ` Robert C. Leif
2002-08-16 18:17 ` Keith Thompson
2002-08-16 15:26 ` Robert Dewar
2002-08-16 15:29 ` Robert Dewar [this message]
2002-08-15 9:26 ` Robert Dewar
2002-08-15 16:17 ` Darren New
2002-08-15 17:25 ` David C. Hoos
2002-08-15 17:31 ` Darren New
2002-08-15 19:59 ` Frank J. Lhota
2002-08-15 17:39 ` tmoran
2002-08-15 19:18 ` Information Systems Annex was RE: Dispatching and generics - Larry Kilgallen
2002-08-15 18:41 ` Hyman Rosen
2002-08-16 15:49 ` Robert Dewar
2002-08-17 6:31 ` Simon Wright
2002-08-17 14:17 ` Robert Dewar
2002-08-15 21:54 ` Decimal Floating types was RE: Information Systems Annex was RE: Dispatching and generics - language lawyer question Robert C. Leif
2002-08-16 15:21 ` Robert Dewar
2002-08-16 16:15 ` Decimal Floating types Warren W. Gay VE3WWG
2002-08-17 10:52 ` Robert Dewar
2002-08-17 14:30 ` Warren W. Gay VE3WWG
2002-08-20 0:26 ` Robert Dewar
2002-08-20 2:35 ` SteveD
2002-08-22 18:15 ` Richard Riehle
2002-08-23 3:23 ` Robert Dewar
2002-08-16 15:47 ` Information Systems Annex (usefulness of Decimal Floats) Warren W. Gay VE3WWG
2002-08-17 10:54 ` Robert Dewar
2002-08-17 14:06 ` Warren W. Gay VE3WWG
2002-08-17 10:56 ` Robert Dewar
2002-08-17 14:12 ` Warren W. Gay VE3WWG
2002-08-17 19:04 ` Robert C. Leif
2002-08-20 0:25 ` Robert Dewar
2002-08-16 15:38 ` Information Systems Annex was RE: Dispatching and generics - language lawyer question Robert Dewar
2002-08-13 22:50 ` Randy Brukardt
2002-08-14 0:02 ` Robert A Duff
2002-07-25 0:40 ` Robert Dewar
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