input: Write a function to generate a two-dimensional array filled with zeros using the given number of rows and columns. If the given input for rows and columns is zero, return an empty array.
  assert generate_zeros_array(3, 3) == [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
  assert generate_zeros_array(0, 0) == []
  assert generate_zeros_array(2, 4) == [[0, 0, 0, 0], [0, 0, 0, 0]]
  assert generate_zeros_array(1, 1) == [[0]]
  assert generate_zeros_array(0, 5) == []
output: def generate_zeros_array(rows, cols):
      if rows == 0 or cols == 0:
          return []
      return [[0] * cols for _ in range(rows)]