Heey!
Excellent text! But if you permit me to point, there is a easier way
to use VLA to multidimensional arrays, like that:

void printMatrix(int n)
{
    int (*mat)[n] = malloc(sizeof(*mat)*n);
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < n; ++j)
        {
            mat[i][j] = i + j;
            printf("%d ", mat[i][j]);
            }
        printf("\n");
    }
}

Att
brudel

Oh, duh, you're right! It seems so obvious now that you've spelled it 
out. I've added an update to my article about this. Thanks!