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| From | James Kuyper <jameskuyper@verizon.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Why no warning? |
| Date | 2012-06-06 11:20 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <4FCF7523.5090406@verizon.net> (permalink) |
| References | <6d2a019d-fea9-406d-9cda-e0d77566f4e6@googlegroups.com> <7o74a9-uea.ln1@spitzner.org> |
On 06/06/2012 10:57 AM, Ralph Spitzner wrote: > Hill Pang wrote: >> I was expecting a warning for this assignment, but can't get from GCC, why? isn't it an overflow? >> >> char c = 0xff; > > You're basically setting c to -127, which is no legal offense :-p He thought, for reasonable (but incorrect) reasons, that he was setting c to 255. When there's a possible difference between common reasonable (but incorrect) expectations and the way a compiler actually works, a sufficiently good compiler should warn you, and gcc does do so. It just needs the right options turned on to do so.
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Why no warning? Hill Pang <pangbw@gmail.com> - 2012-06-06 02:42 -0700
Re: Why no warning? Noob <root@127.0.0.1> - 2012-06-06 12:04 +0200
Re: Why no warning? Hill Pang <pangbw@gmail.com> - 2012-06-06 03:17 -0700
Re: Why no warning? James Kuyper <jameskuyper@verizon.net> - 2012-06-06 06:29 -0400
Re: Why no warning? Noob <root@127.0.0.1> - 2012-06-06 12:54 +0200
Re: Why no warning? David Brown <david@westcontrol.removethisbit.com> - 2012-06-06 12:28 +0200
Re: Why no warning? Noob <root@127.0.0.1> - 2012-06-06 12:55 +0200
Re: Why no warning? David Brown <david@westcontrol.removethisbit.com> - 2012-06-06 13:17 +0200
Re: Why no warning? Hill Pang <pangbw@gmail.com> - 2012-06-06 04:35 -0700
Re: Why no warning? James Kuyper <jameskuyper@verizon.net> - 2012-06-06 08:56 -0400
Re: Why no warning? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-06-07 15:05 +0000
Re: Why no warning? China Blue Max <chine.bleu@yahoo.com> - 2012-06-06 04:53 -0700
Re: Why no warning? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-06 13:29 +0100
Re: Why no warning? Willem <willem@toad.stack.nl> - 2012-06-06 13:07 +0000
Re: Why no warning? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-06 17:37 +0100
Re: Why no warning? Ralph Spitzner <rasp@spitzner.org> - 2012-06-06 16:57 +0200
Re: Why no warning? James Kuyper <jameskuyper@verizon.net> - 2012-06-06 11:20 -0400
Re: Why no warning? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-06 17:45 +0100
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