From: "Peter C. Chapin" <chapinp@acm.org>
Subject: Re: simple question on long_float/short_float
Date: Thu, 30 Sep 2010 09:30:25 -0400
Date: 2010-09-30T09:30:25-04:00 [thread overview]
Message-ID: <4ca491aa$0$2444$4d3efbfe@news.sover.net> (raw)
In-Reply-To: <i81iob$pjr$1@speranza.aioe.org>
On 2010-09-30 04:45, Nasser M. Abbasi wrote:
> So Ada has
>
> Float,
> long_float,
> short_float,
> Interfaces.Fortran.Reals
> Interfaces.Fortran.Double_Precision
A common recommendation is to avoid using the built-in types directly.
Instead define your own:
type My_Floating_Type is digits 12;
If the implementation has a floating point type with at least 12 decimal
digits of precision it will use it as the base type for My_Floating_Type
and all will be well. If the implementation can't handle that much
precision in any of its built-in types you will get a compile time
error. For example you could try
type My_Floating_Type is digits 350;
But I doubt if there is any implementation that will honor that.
The types in Interfaces.Fortran are intended for the case where you are
exchanging data with a corresponding Fortran compiler. It sounds like
you might, in fact, be doing that.
Peter
next prev parent reply other threads:[~2010-09-30 13:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-30 6:17 simple question on long_float/short_float Nasser M. Abbasi
2010-09-30 6:58 ` J-P. Rosen
2010-09-30 8:31 ` Nasser M. Abbasi
2010-09-30 8:45 ` Nasser M. Abbasi
2010-09-30 9:59 ` Mark Lorenzen
2010-09-30 13:30 ` Peter C. Chapin [this message]
2010-09-30 8:46 ` AdaMagica
2010-09-30 10:02 ` Georg Bauhaus
2010-09-30 15:37 ` Jeffrey Carter
2010-09-30 18:22 ` Nasser M. Abbasi
2010-09-30 21:21 ` Peter C. Chapin
2010-10-01 0:29 ` Nasser M. Abbasi
2010-10-01 11:13 ` Peter C. Chapin
2010-10-02 19:57 ` Simon Wright
2010-09-30 15:56 ` Adam Beneschan
2010-10-02 9:11 ` Nasser M. Abbasi
2010-10-02 9:48 ` Dmitry A. Kazakov
2010-10-02 20:09 ` Simon Wright
2010-10-02 9:56 ` Nasser M. Abbasi
2010-10-02 10:45 ` cjpsimon
2010-10-02 16:52 ` Jeffrey Carter
2010-10-02 20:01 ` Georg Bauhaus
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