def make_array(size):
  row = c_double * size
  matrix = row * size

  ptr = matrix()
  for i in range(size):
    ptr[i] = row()
    for j in range(size):
      ptr[i][j] = 0

  return ptr

indata = make_array(2)
libhello.matmul(indata, indata, indata, 2)