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Date: Mon, 7 Mar 2011 11:45:10 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.7.8: Fortran I/O rounding inaccuracy
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On Mar  7 10:39, Thomas Henlich wrote:
> Hi,
> 
> I found the following bug in cygwin 1.7.8 on Windows XP:
> 
> Fortran I/O rounding truncates the result after a certain number of
> digits. The following program:
> ===
> write(*, '(f35.32)') 0.14285714285714285d0
> end
> ===
> gives this output:
>  0.14285714285714284921269000000000
> The expected output is:
>  0.14285714285714284921269268124888
> [...]
> The problem seems limited to the Fortran language, because the C call
> printf("%35.32f\n", 0.14285714285714285) prints the expected result:
>  0.14285714285714284921269268124888

So it's not a Cygwin bug after all.  It's a bug in the GNU fortran
compiler or one of its libraries.  You should ask about this in a GNU
fortran mailing list, perhaps.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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