Re: RFD: Drop double numbers as input format

Newsgroups	comp.lang.forth
Date	2017-06-05 11:20 -0700
References	<a5b211f0-f38f-4188-9cfb-ac80ba0e482f@googlegroups.com> <b6285ba7-f386-44f5-a58a-6a761695d025@googlegroups.com> <oh0med$dtd$1@cherry.spenarnc.xs4all.nl> <y-OdnSNA0raclKjEnZ2dnUU7-WudnZ2d@supernews.com> <oh423b$12g$1@dont-email.me>
Message-ID	<fe5064df-e4ea-4da7-bffa-ea4005235723@googlegroups.com> (permalink)
Subject	Re: RFD: Drop double numbers as input format
From	minforth@arcor.de

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Am Montag, 5. Juni 2017 18:53:21 UTC+2 schrieb Cecil - k5nwa:
> On 6/5/2017 2:32 AM, Andrew Haley wrote:
> > Albert van der Horst <albert@cherry.spenarnc.xs4all.nl> wrote:
> >> In article <b6285ba7-f386-44f5-a58a-6a761695d025@googlegroups.com>,
> >> <mhx@iae.nl> wrote:
> >> <SNIP>
> >>> A minimal floating-point number consists of a single <digit>
> >>> between 0 and 9, followed by 'E'. In addition to this, base
> >>> should be decimal. Therefore, confusion with a double
> >>> (containing a '.' anywhere) is only possible when this
> >>> double also contains 'E' followed by *<digit0>. This
> >>> obviously makes no sense (for an unprefixed double) when
> >>> base is decimal.
> >>
> >> Not using BASE for floating point is a missed opportunity.
> >> Using E for exponent instead of e.g. ~ is a design error.
> > 
> > I understand that Forth is different from other languages by design.
> > However, is it important to use a notation for floating-point numbers
> > that is different from, say, pocket calculators, other programming
> > languages, and IEEE-754?  I'd welcome hex floating-point I/O but I'd
> > be a lot less keen for Forth to use a notation that's not standard-
> > compliant.
> > 
> > Andrew.
> > 
> It's not just that a few languages use a decimal number but everyone 
> that went to school was taught that 10.3 is a decimal number with an 
> integer and a fraction part separated by a decimal point.
> 
> The use of a decimal notation to indicate a double was a bad idea from 
> day one since it went counter to everyone's notion of what a decimal 
> number is, I understand that in the early days floating point was hard 
> on a CPU but still to indicate a double something else should have been 
> used.
> 
> This whole use of a decimal point to indicate a double sized number 
> makes Forther's look ignorant since they ignore decimal number notation 
> that has been taught and used for many centuries.
> 
> -- 
> Cecil - k5nw

In the early days one could use DPL after numeric conversion for loading / implementing fixed-point number math (often sufficient for simple engineering
tasks, precise for financial tasks) or real floating-point number math
(hand coded before coprocessors like the 8087 appeared).

I always found it strange that DPL never made it into the standard.

By checking DPL and BASE most of the discussed number input format
ambiguities would vanish.

Thread

RFD: Drop double numbers as input format Matthias Trute <matthias.trute@gmail.com> - 2017-06-04 01:25 -0700
  Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-04 03:45 -0500
  Re: RFD: Drop double numbers as input format mhx@iae.nl - 2017-06-04 02:10 -0700
    Re: RFD: Drop double numbers as input format albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-06-04 12:12 +0200
      Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-05 02:32 -0500
        Re: RFD: Drop double numbers as input format albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-06-05 10:19 +0200
          Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-05 09:14 +0000
            Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-05 04:57 -0500
          Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-05 04:51 -0500
        Re: RFD: Drop double numbers as input format Cecil Bayona <cbayona@cbayona.com> - 2017-06-05 11:53 -0500
          Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-05 12:29 -0500
          Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-05 11:20 -0700
            Re: RFD: Drop double numbers as input format Julian Fondren <julian.fondren@gmail.com> - 2017-06-05 11:25 -0700
              Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-06 00:50 -0700
                Re: RFD: Drop double numbers as input format stephen@mpeforth.com (Stephen Pelc) - 2017-06-06 10:16 +0000
                Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-06 05:30 -0700
              Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-06 22:54 -0700
          Re: RFD: Drop double numbers as input format Mark Wills <markwills1970@gmail.com> - 2017-06-06 02:12 -0700
            Re: RFD: Drop double numbers as input format Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-06-06 04:23 -0500
              Re: RFD: Drop double numbers as input format Cecil Bayona <cbayona@cbayona.com> - 2017-06-06 10:26 -0500
            Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-06 09:52 +0000
              Re: RFD: Drop double numbers as input format Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-06 04:57 -0700
              Re: RFD: Drop double numbers as input format Mark Wills <markwills1970@gmail.com> - 2017-06-06 06:01 -0700
              Re: RFD: Drop double numbers as input format Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2017-06-06 18:07 +0100
            Re: RFD: Drop double numbers as input format Julian Fondren <julian.fondren@gmail.com> - 2017-06-06 08:09 -0700
              Re: RFD: Drop double numbers as input format Mark Wills <markwills1970@gmail.com> - 2017-06-06 11:51 -0700
                Re: RFD: Drop double numbers as input format Julian Fondren <julian.fondren@gmail.com> - 2017-06-06 12:19 -0700
      Re: RFD: Drop double numbers as input format Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2017-06-10 23:23 +0100
    Re: RFD: Drop double numbers as input format Paul Rubin <no.email@nospam.invalid> - 2017-06-04 17:05 -0700
      Re: RFD: Drop double numbers as input format rickman <gnuarm@gmail.com> - 2017-06-04 21:38 -0400
      Re: RFD: Drop double numbers as input format Julian Fondren <julian.fondren@gmail.com> - 2017-06-04 20:26 -0700
        Re: RFD: Drop double numbers as input format mhx@iae.nl - 2017-06-05 00:01 -0700
          Re: RFD: Drop double numbers as input format Matthias Trute <matthias.trute@gmail.com> - 2017-06-05 01:18 -0700
      Re: RFD: Drop double numbers as input format mhx@iae.nl - 2017-06-04 23:47 -0700
      Re: RFD: Drop double numbers as input format Ron Aaron <rambamist@gmail.com> - 2017-06-05 09:56 +0300
      Re: RFD: Drop double numbers as input format Mark Wills <markwills1970@gmail.com> - 2017-06-06 01:46 -0700
      Re: RFD: Drop double numbers as input format "HAA" <someone@microsoft.com> - 2017-06-07 21:44 +1000
        Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-07 05:13 -0700
          Re: RFD: Drop double numbers as input format "HAA" <someone@microsoft.com> - 2017-06-08 12:36 +1000
        Re: RFD: Drop double numbers as input format Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-06-07 07:33 -0700
          Re: RFD: Drop double numbers as input format "HAA" <someone@microsoft.com> - 2017-06-08 12:34 +1000
            Re: RFD: Drop double numbers as input format Alex <alex@rivadpm.com> - 2017-06-08 09:55 +0100
              Re: RFD: Drop double numbers as input format "HAA" <someone@microsoft.com> - 2017-06-11 17:22 +1000
        Re: RFD: Drop double numbers as input format hughaguilar96@gmail.com - 2017-06-08 17:13 -0700
  Re: RFD: Drop double numbers as input format mhx@iae.nl - 2017-06-04 02:18 -0700
  Re: RFD: Drop double numbers as input format "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-04 09:54 +0000
  Re: RFD: Drop double numbers as input format albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-06-04 12:07 +0200
  Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-04 10:18 +0000
    Re: RFD: Drop double numbers as input format mhx@iae.nl - 2017-06-04 05:47 -0700
      Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-04 15:44 +0000
    Re: RFD: Drop double numbers as input format Matthias Trute <matthias.trute@gmail.com> - 2017-06-04 09:10 -0700
      Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-04 16:21 +0000
      Re: RFD: Drop double numbers as input format Coos Haak <htrofhc@gmail.com> - 2017-06-04 18:33 +0200
    Re: RFD: Drop double numbers as input format Bernd Paysan <bernd@net2o.de> - 2017-06-07 01:21 +0200
      Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-06 22:57 -0700
        Re: RFD: Drop double numbers as input format Julian Fondren <julian.fondren@gmail.com> - 2017-06-06 23:34 -0700
          Re: RFD: Drop double numbers as input format minforth@arcor.de - 2017-06-07 01:12 -0700
  Re: RFD: Drop double numbers as input format The Beez <the.beez.speaks@gmail.com> - 2017-06-07 02:38 -0700
  Re: RFD: Drop double numbers as input format JennyB <jennybrien@googlemail.com> - 2017-06-07 02:45 -0700
    Re: RFD: Drop double numbers as input format foxaudioresearch@gmail.com - 2017-06-08 18:34 -0700
      Re: RFD: Drop double numbers as input format Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2017-06-10 23:08 +0100
        Re: RFD: Drop double numbers as input format anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-06-11 12:32 +0000
    Re: RFD: Drop double numbers as input format "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-06-09 18:07 +0000

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