Description:
You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).
Follow up:
Could you do this in-place?
Code:
1 void rotate(vector<vector<int>>& matrix) { 2 int n = matrix.size(); 3 vector< vector<int> > temp(matrix); 4 for (int i = 0; i < n; ++i) 5 { 6 for (int j = 0; j < n; ++j) 7 { 8 matrix[i][j] = temp[n-1-j][i]; 9 } 10 } 11 }
原文：http://www.cnblogs.com/happygirl-zjj/p/4574627.html