form1.frm

vb电子书籍

   VERSION 5.00
   Begin VB.Form Form1
      BackColor       =   &H00E0E0E0&
      ClientHeight    =   3195
      ClientLeft      =   60
      ClientTop       =   345
      ClientWidth     =   4680
      FillColor       =   &H00C0C0C0&
      BeginProperty Font
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Icon            =   "Form1.frx":0000
      LinkTopic       =   "Form1"
      MaxButton       =   0   'False
      ScaleHeight     =   3195
      ScaleWidth      =   4680
      StartUpPosition =   2  '屏幕中心
      Begin VB.CommandButton Command1
         Caption         =   "Command1"
         Height          =   375
         Left            =   1080
         TabIndex        =   0
         Top             =   1560
         Width           =   1695
      End
   End
   Attribute VB_Name = "Form1"
   Attribute VB_GlobalNameSpace = False
   Attribute VB_Creatable = False
   Attribute VB_PredeclaredId = True
   Attribute VB_Exposed = False
'CODE Manger By BcodeXRose
'##################################################################
'## 过程名称：newton
'## 参数：ByVal 为型
'## 参数：x#  类型不确定
'## 参数：ByVal 为#型
'##################################################################
Public Sub newton(ByVal x0#, x#, ByVal eps#)
    Dim fx#, flx#
    Do
        fx = 3 * x0 * x0 * x0 - 4 * x0 * x0_ - 5 * x0 + 13
        flx = 9 * x0 * x0 - 8 * x0 - 5
        x = x0 - fx / flx
        If Abs(x - x0) < eps Then Exit Do
        x0 = x
    Loop
End Sub
    
'##################################################################
'## 过程名称：Command1_Click
'## 参数： 无
'##################################################################
Private Sub Command1_Click()
    Dim root#
    Call newton(3#, root, 0.00001)
    Print root
    
End Sub