求圆周率∏的近似值.公式为= 1-+-…+（-1）（n+1）×,直到最后一项的绝对值小于0.000001 为止_数学解答

求圆周率∏的近似值.公式为= 1-+-…+（-1）（n+1）×,直到最后一项的绝对值小于0.000001 为止

人气：417 ℃　时间：2020-03-28 14:02:25

解答

Private Sub Form_Click()Dim pi As DoubleDim n As Longn = 1Dopi = pi + 4 * ((-1) ^ (n - 1) * (1 / (2 * n - 1)))n = n + 1Loop Until 1 / (2 * n - 1) < 0.000001Print piEnd Sub