[C programming]

How do I rotate a 2D array 90 degrees counter-clockwise?

For example, if I have a 4x4 2D array that prints out as

0 1 2 3

4 5 6 7

8 9 10 11

12 13 14 15

and I want to rotate it 90 degrees counter-clockwise and get

3 7 11 15

2 6 10 14

1 5 9 13

0 4 8 12