C | Advanced Pointer | Question 8

(A)

2 3 5 6

(B)

2 3 4 5

(C)

4 5 0 0

(D)

none of the above

Answer: (A)

Explanation:

In the above code, we have declared:  int a[][3] = {1, 2, 3, 4, 5, 6};

This line declares a 2D array with 2 rows and 3 columns. The elements are initialized in row-major order: 1, 2, and 3 are the elements of the first row, and 4, 5, and 6 are the elements of the second row.

int (*ptr)[3] = a; This line declares a pointer to an array of 3 integers and assigns it the address of the first row of the array a. The pointer ptr now points to the first row of a.

printf(“%d %d “, (*ptr)[1], (*ptr)[2]); his line prints the a[0][1]and a[0][2] elements of the first row of a, which are 2 and 3, respectively. So the output of this line is “2 3 “.

++ptr; This line increments the pointer ptr, causing it to point to the second row of a.

printf(“%d %d\n”, (*ptr)[1], (*ptr)[2]); This line prints the second and third elements of the second row of a, which are 5 and 6, respectively. The final output is “2 3 5 6″.

Hence the correct answer is (A).

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