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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.ada
Subject: Re: simple question on long_float/short_float
Date: Sat, 02 Oct 2010 02:56:03 -0700
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Date: 2010-10-02T02:56:03-07:00
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On 10/2/2010 2:11 AM, Nasser M. Abbasi wrote:

>
> ---- Ada v2 -----
> with ada.text_io;
> procedure test is
>     type my_float_type is digits 16;
>     package my_float_IO is new Ada.Text_IO.float_IO(my_float_type);
>      use  my_float_IO;
>     a : my_float_type := 2.3;
> begin
>    Put( item=>a,Fore=>25,Aft=>16) ;
> end test;
>
> and now the output is
>
> 2.3000000000000000E+00
>
> ------------------------------
>
> 1) So, it seems to me that Ada did use Fortran double in v1. since
> output is different than in v2. Unless I made a mistake in v2.

Yes, I made a mistake.  I did not use Ada float type. I thought doing 
digits 16 is that. that is wrong.  When I changed it to the following

------------------
with ada.text_io;

procedure test is
    package my_float_IO2 is new Ada.Text_IO.float_IO(long_float);
      use  my_float_IO2;
begin
   Put( item=>2.3,Fore=>25,Aft=>16) ;
end test;
----------------------

Now it printed

             2.2999999999999998E+00

So, the web page is correct !  gnat long_float is the same as Fortran 
double.

--Nasser