48. 旋转图像

C代码：

void rotate(int** matrix, int matrixSize, int* matrixColSize){
    int m = matrixSize;
    int n = matrixColSize[0];
    int arr[m*n];
    int arrTop = 0;
    memset(arr, 0, sizeof(int) * m * n);
    for (int i = 0; i < m; ++i) {
        for (int j = 0; j < n; ++j) {
            arr[arrTop++] = matrix[i][j];
        }
    }
    arrTop = 0;
    for (int j = n - 1; j >= 0; --j) {
        for (int i = 0; i < n; ++i) {
            matrix[i][j] = arr[arrTop++];
        }
    }
}