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Groups > comp.lang.c > #102893
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: C declarations |
| Date | 2017-02-01 17:58 +1300 |
| Message-ID | <efd881FhgsiU1@mid.individual.net> (permalink) |
| References | <o6nd9u$rp1$1@dont-email.me> <o6r0gj$4di$1@dont-email.me> <o6r22b$ab3$1@dont-email.me> |
On 02/ 1/17 11:13 AM, BartC wrote:
> On 31/01/2017 21:46, Andrey Tarasevich wrote:
>> On 1/30/2017 5:00 AM, BartC wrote:
>>> I've been studying C's syntax in a bit more detail and trying to match
>>> up what a compiler allows, with the grammar. Here's one example:
>>>
>>> #include <stdio.h>
>>>
>>> a=10, b=20, c=30;
>>>
>>> int main(void){}
>>>
>>> This compiles fine.
>>
>> I can't say for sure if this was OK in K&R, but in the standard C (even
>> in the first C89/90) this is already illegal. The grammar for
>> _declaration_ requires at least a storage class specifier, a
>> type-specifier or a type qualifier to be present. Which means that if
>> you wanted to take advantage of the "implicit int" rule in C89/90, you'd
>> have to do at least
>>
>> static a = 10, b = 20, c = 30;
>>
>> or, say,
>>
>> const a = 10, b = 20, c = 30;
>>
>> What you have in your original code is not compliant with C89/90
>> requirements.
>
> Out of six compilers, three gave a warning about an implicit int, the
> other three said nothing at all.
Care to name and shame?
--
Ian
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C declarations BartC <bc@freeuk.com> - 2017-01-30 13:00 +0000
Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-01-30 14:25 +0100
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-01-30 11:42 -0800
Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 13:46 -0800
Re: C declarations BartC <bc@freeuk.com> - 2017-01-31 22:13 +0000
Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 16:43 -0800
Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 17:06 -0800
Re: C declarations Ian Collins <ian-news@hotmail.com> - 2017-02-01 17:58 +1300
Re: C declarations luser droog <luser.droog@gmail.com> - 2017-01-31 22:42 -0800
Re: C declarations Ian Collins <ian-news@hotmail.com> - 2017-02-01 19:48 +1300
Re: C declarations Robert Wessel <robertwessel2@yahoo.com> - 2017-02-01 01:18 -0600
Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 10:10 +0100
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 11:39 +0000
Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 13:55 +0100
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 13:22 +0000
Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 16:30 +0100
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 08:15 -0800
Re: C declarations supercat@casperkitty.com - 2017-02-01 08:44 -0800
Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 20:56 +0100
Re: C declarations supercat@casperkitty.com - 2017-02-01 08:29 -0800
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 17:24 +0000
Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 09:55 -0800
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 18:44 +0000
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 11:03 -0800
Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 12:26 -0800
Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 13:03 -0800
Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 13:12 -0800
Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-03 16:07 -0800
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 10:44 -0800
Re: C declarations jameskuyper@verizon.net - 2017-02-01 11:08 -0800
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 10:40 -0800
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 17:04 +0000
Re: C declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-01 19:58 +0000
Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 21:23 +0000
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 08:08 -0800
Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-02-01 12:45 -0800
Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-03-06 11:19 -0800
Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-03-06 11:27 -0800
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