VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "牛頓迭代法"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   3000
      TabIndex        =   1
      Top             =   2280
      Width           =   855
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   360
      TabIndex        =   0
      Text            =   "Text1"
      Top             =   360
      Width           =   2655
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_Click()
    Dim x1 As Single
    x = 3
    Do While Abs(x * x - 5) > 0.000001
        x = (x + 5 / x) / 2
    Loop
    Text1.Text = x
End Sub