Re: where exactly c++,c fail and Ada gets thru'

[Keith Thompson <kst-u@mib.org>]

Simon Wright <simon@pushface.org> writes:
> "jimmaureenrogers@worldnet.att.net"
> <jimmaureenrogers@worldnet.att.net> writes:
>
>>                                      The C standard explicitly
>> allows one to access one element beyond the end of an array to
>> support common practice in thousands of C programs. The C
>> standard indicates that accessing more than one beyond the end
>> of an array leads to undefined behavior.
>
> As I remember it, you are allowed to use the address of the element
> one past the end of the array in a comparison with the addresses of
> other elements of the same array, but not to access its content?

Correct.  Note that "allowed to" is a fairly weak statement in C;
accessing elements beyond the bounds of an array isn't "allowed", but
it's undefined behavior, meaning that the implementation is under no
obligation to diagnose the error.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
San Diego Supercomputer Center             <*>  <http://users.sdsc.edu/~kst>
We must do something.  This is something.  Therefore, we must do this.