def make_3d_array(a, b, c):
    """Create an array with three dimensions.

    Actually a list-of-lists-of-lists, but the result can be treated as an
    array with dimensions ``[a][b][c]``.

    """
    x = [0.0] * c
    arr = []
    for i in range(a):
        arr.append([list(x) for j in range(b)])

    return arr