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Article #49726Re: strange output
From: Fergus Henderson
Date: Wed, 08 Dec 1993 18:13
Date: Wed, 08 Dec 1993 18:13
27 lines
1326 bytes
1326 bytes
richards@aaron.music.qc.edu (David Richards) writes:
>Hello folks - here's the problem:
>
>#include <stdio.h>
>main()
>{
> long double ldb = 22343546554.435551;
> printf("ldb = %f\n", ldb);
>}
>
>compile with: gcc -o longd longd.c
>BUT THE OUTPUT READS: ldb = 8.500005
>
>Forgive me if I'm dreaming but it looks like a bug to me!!
>Am I missing something that's so painfully obvious that an
>amoeba could see it?!#%@^??
Yes, even an ameoba could see the probe - if it used -Wall!
Remember, -Wall is your friend:
foo.c:5: warning: double format, long double arg (arg 2)
You need to use %lf instead of %f.
--
Fergus Henderson fjh@munta.cs.mu.OZ.AU
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11318c,6f7a036dfb120868 X-Google-Attributes: gid11318c,public X-Google-ArrivalTime: 1993-12-13 03:58:53 PST Newsgroups: gnu.gcc.help Path: arc1-ca.pugleaf.net!gmd.de!Germany.EU.net!EU.net!uunet!munnari.oz.au!cs.mu.OZ.AU!munta.cs.mu.OZ.AU!fjh From: fjh@munta.cs.mu.OZ.AU (Fergus Henderson) Subject: Re: strange output Message-ID: <9334305.8663@mulga.cs.mu.OZ.AU> Sender: news@cs.mu.OZ.AU Organization: Computer Science, University of Melbourne, Australia References: <9312071842.AA02949@aaron.music.qc.edu> Distribution: gnu Date: Wed, 8 Dec 1993 18:13:28 GMT Lines: 27