typedef char [4] A和typedef char（＆A）[4]有什么区别？

Question

What's the difference between

typedef char[4] A;

and

typedef char (&A)[4];

?

Now I'm just trying to meet post quality standards by writing at least one complete sentence, since my question was already clear at the title.

Answer 1

typedef char[4] A;

This is an invalid attempt to declare a typedef for an array.

typedef char (&A)[4];

This declares a typedef for a reference to an array, which is not the same as an array.

To make the first one valid it should be typedef char A[4]; but that's still a typedef for an array, which is still different to the second one.