vector<vector<int> > rotateMatrix(vector<vector<int> > mat, int n) {
        // write code here
        //水平翻转
        for (int i = 0; i < n / 2; ++i) {
            for (int j = 0; j < n; ++j) {
                swap(mat[i][j], mat[n - i - 1][j]);
            }
        }
        // 主对角线翻转
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < i; ++j) {
                swap(mat[i][j], mat[j][i]);
            }
        }
        return mat;
    }

作者:LeetCode-Solution 链接:https://leetcode-cn.com/problems/rotate-image/solution/xuan-zhuan-tu-xiang-by-leetcode-solution-vu3m/ 来源:力扣(LeetCode) 著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。