Teaching const

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In article <27071 at amdahl.uts.amdahl.com> nw at amdahl.uts.amdahl.com (Neal Weidenhofer) writes:
>	int * const a;
>decodes as:
>	a is a constant,
>	a is a constant pointer,
>	a is a constant pointer to an int.
>		(i.e., a cannot be modified but *a can.)

Note that:
	 int a[1];
decodes as:
       a is a constant,
       a is a constant pointer,
       a is a constant pointer to an int.
	       (i.e., a cannot be modified but *a can.)

But there must (?) be some difference between the two.  How do you teach
this?

     Marv Rubinstein.