I need to rotate a matrix n*m 90 on C++. I was given these instructions:

Takes a signed integer as the argument corresponding to an angle in degrees and rotates the image in-place by that angle.

You can assume the angle in degrees will always be a multiple of 90.

Positive value of degrees means an anti-clockwise rotation while negative means a clockwise rotation.

You should allow for cascading calls so that A.Rotate(90).Rotate(90) finally rotates the image A by 180 degrees.