How to declare a pointer to a character array in C?

Question

How do I declare a pointer to a character array in C?

Answer 1

You can declare it as extern char (*p)[];, but it's an incomplete type. This is of course because C has no "array" type generically that is a complete type; only arrays of a specific size are complete types.

The following works:

extern char (*p)[];

char arr[20];

char (*p)[20] = &arr;  // complete type now: p points to an array of 20 chars