/* declare an array 4 units in length */
int array[4];

/* declare a pointer for the array */
int *array_ptr;

/* set the array_ptr to the location of the first element in the array */
array_ptr = &array[0];

/* an alternate way of assigning array_ptr to the first element of the array */
array_ptr = array;

/* assign some values to the elements in the declared array */
array[0] = 0;
array[1] = 1;
array[2] = 2;
array[3] = 3;

/* reassign array[0] the value 12 */
*array_ptr = 12;

/* reassign array[1] the value 13 */
*(array_ptr + 1) = 13;

/* reassing array[3] the value 14 */
*(array_ptr + 3) = 14;