C Programming - Complicated Declarations - Discussion

Pointer Array Concept i.e., *p[30] is pointer Array,means *p points to 30 integers of an Array.

Pointer array concept

Friends its a very simple one. int (*ptr) is nothing but a ptr which points to some single integer value.

Now int (*ptr)[30] is something interesting here u are declaring not one pointer to point some integer value.

Here you are declaring 30 pointers to point some integer values and these 30 pointers are stored in array and that's why int (*ptr)[30] is an array of 30 integer pointers.

int *ptr[30]; //an array of 30 pointers (equivalent: int* ptr[30];).

int (*ptr)[30]; //a pointer to an array of 30 elements (int).

int *(*ptr)[30]; //a pointer to an array of 30 pointers (equivalent: int* (*ptr)[30];).