Re: Array-as-pointer Syntax

From	Ike Naar <ike@iceland.freeshell.org>
Newsgroups	comp.lang.c
Subject	Re: Array-as-pointer Syntax
Date	2019-03-29 18:08 +0000
Organization	A noiseless patient Spider
Message-ID	<slrn3u9oq9snpo.hs7.ike@iceland.freeshell.org> (permalink)
References	<761347c7-4f03-42f3-a156-5f357c8ae091@googlegroups.com> <c683d9df-f5c5-4ed7-b614-06644b32cd6d@googlegroups.com>

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On 2019-03-29, John Bode <jfbode1029@gmail.com> wrote:
> On Thursday, March 28, 2019 at 12:04:43 PM UTC-5, David T. Ashley wrote:
>> Given:
>> 
>>   int x[1000];
>> 
>> what is the difference between:
>> 
>>    memset(x, 0, sizeof(x));
>> 
>> and
>> 
>>    memset(&x, 0, sizeof(x));
>> 
>> I would think there is NO difference, but I might be missing something ...
>
> x and &x will evaluate to the same address value, although the types of the expressions
> will be different (int * vs int (*)[1000]).  So there is effectively no difference between the
> two calls.  
>
> Personally, I'd use the first form.  

Perhaps the second form would be more consistent.

If x had, for instance, a simple type like 'long' or 'double',
or a struct type, one would certainly use the second form 'memset(&x, 0, sizeof x)',
so why not when x has array type?

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Thread

Array-as-pointer Syntax "David T. Ashley" <dashley@gmail.com> - 2019-03-28 10:04 -0700
  Re: Array-as-pointer Syntax Bart <bc@freeuk.com> - 2019-03-28 17:18 +0000
    Re: Array-as-pointer Syntax David Brown <david.brown@hesbynett.no> - 2019-03-28 21:31 +0100
  Re: Array-as-pointer Syntax Ian Collins <ian-news@hotmail.com> - 2019-03-29 06:23 +1300
    Re: Array-as-pointer Syntax James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-28 12:09 -0700
      Re: Array-as-pointer Syntax Ian Collins <ian-news@hotmail.com> - 2019-03-29 08:21 +1300
      Re: Array-as-pointer Syntax Ike Naar <ike@iceland.freeshell.org> - 2019-03-28 22:59 +0000
        Re: Array-as-pointer Syntax James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-28 17:44 -0700
    Re: Array-as-pointer Syntax Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-03-28 20:12 +0000
  Re: Array-as-pointer Syntax James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-28 11:57 -0700
    Re: Array-as-pointer Syntax Keith Thompson <kst-u@mib.org> - 2019-03-28 13:57 -0700
      Re: Array-as-pointer Syntax James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-28 19:50 -0400
  Re: Array-as-pointer Syntax Keith Thompson <kst-u@mib.org> - 2019-03-28 14:04 -0700
  Re: Array-as-pointer Syntax John Bode <jfbode1029@gmail.com> - 2019-03-29 07:24 -0700
    Re: Array-as-pointer Syntax Ike Naar <ike@iceland.freeshell.org> - 2019-03-29 18:08 +0000

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