[Freeciv-Dev] Re: (offtopic) C subscripts; was Re: Compiler-warnings

[Gaute B Strokkenes <gs234@xxxxxxxxxxxxxxxx>]

On Wed, 24 Jan 2001, dwpfitzner@xxxxxxxxx wrote:

> Raimar Falke <hawk@xxxxxxxxxxxxxxxxxxxxxxx> wrote: >
> 
>> [ Negative subscript values? Is this a gnu extension? What are the
>> semantics? 
> 
> Negative subscript values have just the same semantics as
> non-negative ones -- its just pointer arithmetic:
>    a[b]  =  *(a + b)

Incidentally, this means that [] is abelian:

int
main (int argc, char *argv[])
{
  printf("The third letter of the alphabet is %c.\n", 2["ABC"]);
}

-- 
Big Gaute                               http://www.srcf.ucam.org/~gs234/
Impudent..  Yet possessing a certain ALUMINUM SILICATE
 overbite....Needs REDDY-WHIP!!