From: "Nasser M. Abbasi" <nma@12000.org>
Subject: Re: getting same output as gfortran, long_float
Date: Fri, 01 May 2015 13:03:45 -0500
Date: 2015-05-01T13:03:45-05:00 [thread overview]
Message-ID: <mi0f5u$rre$1@speranza.aioe.org> (raw)
In-Reply-To: mi0d1s$m8o$1@speranza.aioe.org
On 5/1/2015 12:27 PM, Nasser M. Abbasi wrote:
>
> Thanks. My mistake. So the command line flag was needed after all!!
>
>> gfortran -Wall -fdefault-real-8 foo2.f90
>> ./a.out
> 1.82898948331047096479195244627343369E-0003
>
> Without the flag, the digit is different
>
>> gfortran -Wall foo2.f90
>> ./a.out
> 1.82898948331047112025871115292829927E-0003
>
...
> I thought with -Wall it will catch all these things, but I think
> I need more flags to detect this user error
>
Just for completion, there is a flag that checks for this user error:
----------------------------
>gfortran -Wall -Wconversion -Wconversion-extra foo2.f90
foo2.f90:6.4:
x = 12.0D0 * 0.0001D0/(1.0D0 * (1.0D0 - 0.1D0)**4 )
1
Warning: Conversion from REAL(8) to REAL(16) at (1)
-------------------------------
While this gives clean compile:
gfortran -Wall -Wconversion -Wconversion-extra -fdefault-real-8 foo2.f90
So, Fortran can be made to be "stroger typed", but it I think it takes
more effort than with Ada, which would have detected such
implicit conversions at the language semantics level without
the need of a compiler switches.
--Nasser
next prev parent reply other threads:[~2015-05-01 18:03 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-30 21:17 getting same output as gfortran, long_float Nasser M. Abbasi
2015-04-30 22:08 ` Dmitry A. Kazakov
2015-04-30 22:11 ` Dmitry A. Kazakov
2015-04-30 22:37 ` Nasser M. Abbasi
2015-04-30 22:53 ` Nasser M. Abbasi
2015-05-01 7:22 ` Jacob Sparre Andersen
2015-05-01 1:12 ` Nasser M. Abbasi
2015-05-01 6:52 ` Dmitry A. Kazakov
2015-05-01 7:32 ` Nasser M. Abbasi
2015-05-01 7:45 ` Dmitry A. Kazakov
2015-05-04 0:15 ` robin.vowels
2015-05-04 7:21 ` Dmitry A. Kazakov
2015-05-04 8:53 ` robin.vowels
2015-05-04 10:18 ` Dmitry A. Kazakov
2015-05-04 13:45 ` robin.vowels
2015-05-04 14:47 ` Dmitry A. Kazakov
2015-05-07 2:01 ` robin.vowels
2015-05-01 23:24 ` Dennis Lee Bieber
2015-05-04 0:09 ` robin.vowels
2015-05-01 7:01 ` Dmitry A. Kazakov
2015-05-04 0:42 ` robin.vowels
2015-04-30 22:12 ` Jeffrey R. Carter
2015-04-30 22:27 ` Qun-Ying
2015-05-01 0:59 ` Dennis Lee Bieber
2015-04-30 22:32 ` Nasser M. Abbasi
2015-05-01 1:16 ` Jeffrey R. Carter
2015-05-01 1:40 ` Nasser M. Abbasi
2015-05-01 7:47 ` Jacob Sparre Andersen
2015-05-01 15:39 ` Waldek Hebisch
2015-05-01 17:27 ` Nasser M. Abbasi
2015-05-01 18:03 ` Nasser M. Abbasi [this message]
2015-05-04 0:51 ` robin.vowels
2015-05-04 0:47 ` robin.vowels
2015-05-01 8:21 ` Simon Wright
2015-05-01 11:55 ` Georg Bauhaus
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox