求π: π/4=1-1/3+1/5-1/7+...+1/(4n-3)-1/(4n-1),n=10000 VB编程

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解决时间 2021-02-18 02:47

提问者网友：欲劫无渡
2021-02-17 19:59

求π: π/4=1-1/3+1/5-1/7+...+1/(4n-3)-1/(4n-1),n=10000 VB编程...

用fuction定义...

大家给说说啊

最佳答案

五星知识达人网友：蓝房子
2021-02-17 20:56

Private Sub Command1_Click()
'这里调用求pi函数,
p = pi(10000)
'p即为所求``
End Sub

''下面是求pi的函数
Private Function pi(ByVal n As Long) As Double
For i = 1 To 2 * n - 1
pi = pi + 1 / (4 * i - 3) - 1 / (4 * i - 1)
Next i
pi = 4 * pi
End Function

全部回答

1楼网友：duile
2021-02-17 23:03

汗书本不是有代码吗运行结果π=3.141499 Function pai(n As Single) Dim i, t, e e = 1 'π/4=1-1/3+1/5-1/7+...+1/(4n-3)-1/(4n-1),n=10000 VB编程... For i = 1 To n t = 1 / (2*i-1) pai = pai + t * e e = e * (-1) Next i Text1 = "π=" & 4 * pai End Function Private Sub Form_Load() pai (10000) End Sub

2楼网友：舊物识亽
2021-02-17 21:58

private sub command1_click() dim x as double dim sum as double dim sum1 as double dim sum2 as double sum1 = 1 for i = 1 to 10000 x = (1 / (4 * i - 1)) y = (1 / (4 * (i + 1) - 3)) sum1 = sum1 + x sum2 = sum2 + y next i sum=sum1-sum2 label1.caption = sum end sub

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