What is pointer to array in c?

Question

int arr[ ] = { 1, 2 };
p = arr; /* p is pointing to arr */

How pointer p will behave ?

Answer 1

Explanation:
A pointer which holds base address of an array or address of any element of an array is known as pointer to array. For example:

(a)

#include<stdio.h>
int main(){
  int arr[5]={100,200,300};
  int *ptr1=arr;
  char *ptr2=(char *)arr;
  printf("%d   %d",*(ptr1+2),*(ptr2+4));
  return 0;       
}

Output: 300   44

(b)

#include<stdio.h>
int main(){
  static int a=11,b=22,c=33;
  int * arr[5]={&a,&b,&c};
  int const * const *ptr=&arr[1];
  --ptr;
  printf("%d ",**ptr);
  return 0;        
}

Output: 11

Answer 2

1. Pointer variable holds address of some data (pointer type should match data type).
2. An array variable holds the address of the first element of the array.

In effect, pointer to an array of particular type holds the address of the array of the same data type.
For example:

double *p; // Pointer to double data type
double balance[10]; // Array of double data type

p = balance; // Pointer points to the address of first element of the array.
For detailed reference: http://www.tutorialspoint.com/cprogramming/c_pointer_to_an_array.htm