When is pointer to array useful?

Question

I can declare:

int (*ap)[N];

So ap is pointer to int array of size N. Why is this ever useful? If I pass it to function, what usefu

Answer 1

Following code is a part of my article : Pointers and Arrays in C C++

You can check it out @ http://pointersandarrays.blogspot.com/

Pointers and 2D Arrays

Following code snippet illustrates how to declare and access a 2D array. Underneath 2D Array lies a single dimensional array. You will get be sure of this after playing with the following piece of code.

Code Snippet #4

 #include

Output #4:

Understanding Pointers and 2D Arrays  

Print array using array name ...  
 0  2  4  6  8   
 1  3  5  7  9   
 2  4  6  8 10   

Print array using a pointer. Proof of 1 D array being allocated ...  
0 2 4 6 8 1 3 5 7 9 2 4 6 8 10   
Notice that array is printed row by row in a linear fashion.