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Re: [Tinycc-devel] Strange sizeof construct


From: Marc Andre Tanner
Subject: Re: [Tinycc-devel] Strange sizeof construct
Date: Wed, 14 Nov 2007 20:13:14 +0100
User-agent: Mutt/1.5.17 (2007-11-01)

On Wed, Nov 14, 2007 at 12:39:18AM +0100, grischka wrote:
> > Could a C guru out there please tell me why the following works? 
> > Extra points if you can explain why it makes sense.
> > 
> > #include <stdio.h>
> > 
> > int main(){
> > int arr[10];
> > printf("%d\n",sizeof arr[0]);  // ok
> > printf("%d\n",sizeof(arr[0])); // ok
> > printf("%d\n",sizeof(arr)[0]); // ok, but why?
> > return 0;
> > }
> 
> And what about that one:
> 
>     printf("%d\n",sizeof (0)[arr]); 

Yep even stranger. The good thing is that if you add another pair of
parantheses tcc takes it and life is good.

  printf("%d\n",sizeof((arr)[0]));
  printf("%d\n",sizeof((0)[arr]));

> -- gr
Marc 

-- 
 Marc Andre Tanner >< http://www.brain-dump.org/ >< GPG key: CF7D56C0




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