practice6_17.frm

来自「深圳大学的vb上机与教学的课件」· FRM 代码 · 共 62 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "用矩形法求定积分—单击窗体开始计算"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   2  '屏幕中心
   Begin VB.Label Label1 
      BorderStyle     =   1  'Fixed Single
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   15
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   2160
      TabIndex        =   1
      Top             =   1200
      Width           =   2295
   End
   Begin VB.OLE OLE1 
      BackStyle       =   0  'Transparent
      BorderStyle     =   0  'None
      Class           =   "Equation.3"
      Height          =   885
      Left            =   240
      OleObjectBlob   =   "practice6_17.frx":0000
      SizeMode        =   1  'Stretch
      TabIndex        =   0
      Top             =   960
      Width           =   1800
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Click()
  N = Val(InputBox("请指定等分区间数", "", "50"))
  H = 8 / N
  X = -4
  Area = 0
  F1 = 1 / (1 + X ^ 2)
  For I = 1 To N
    Area1 = F1 * X
    Area = Area + Area1
    X = X + H
    F1 = 1 / (1 + X ^ 2)
  Next I
  Label1.Caption = Format(Area, "0.000000")
End Sub