Rotate Image

-----QUESTION-----

You are given an n x n 2Dmatrix representing an image.

Rotate the image by 90 degrees (clockwise).

Follow up:
Could you do this in-place?

-----SOLUTION-----

class Solution {public:    void rotate(vector<vector<int> > &matrix) {        int temp;        for(int i = 0; i < matrix.size()/2; i++)        {            for(int j = i; j < matrix[0].size()-i-1; j++)            {                temp = matrix[i][j];                matrix[i][j] = matrix[matrix[0].size()-1-j][i];                matrix[matrix[0].size()-1-j][i] = matrix[matrix.size()-1-i][matrix.size()-1-j];                matrix[matrix.size()-1-i][matrix.size()-1-j] =  matrix[j][matrix.size()-1-i];                matrix[j][matrix.size()-1-i] = temp;            }        }    }};