In C, are arrays pointers or used as pointers?

Question

My understanding was that arrays were simply constant pointers to a sequence of values, and when you declared an array in C, you were declaring a pointer and allocating spac

Answer 1

If 'y' is a constant pointer, why does it have a size of 20, like the sequence of values it points to?

Because z is the address of the variable, and will always return 8 for your machine. You need to use the dereference pointer (&) in order to get the contents of a variable.

EDIT: A good distinction between the two: http://www.cs.cf.ac.uk/Dave/C/node10.html