practice6_2.frm

来自「深圳大学的vb上机与教学的课件」· FRM 代码 · 共 96 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   2265
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4605
   LinkTopic       =   "Form1"
   ScaleHeight     =   2265
   ScaleWidth      =   4605
   StartUpPosition =   2  '屏幕中心
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   1800
      TabIndex        =   3
      Top             =   1200
      Width           =   2175
   End
   Begin VB.CommandButton Command1 
      Caption         =   "计算"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   840
      TabIndex        =   2
      Top             =   1200
      Width           =   855
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   1800
      TabIndex        =   0
      Top             =   360
      Width           =   2175
   End
   Begin VB.Label Label1 
      Caption         =   "N="
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   1200
      TabIndex        =   1
      Top             =   480
      Width           =   375
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
  s = 0
  n = Val(Text1.Text)
  k = 2
  For i = 1 To 2 * n - 1 Step 2
    s = s + (-1) ^ k * 1 / i
    k = k + 1
  Next i
  s = 4 * s
  Text2.Text = Format(s, "0.0000")
End Sub