VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   855
      Left            =   2520
      TabIndex        =   3
      Top             =   1320
      Width           =   1935
   End
   Begin VB.CommandButton Command1 
      Caption         =   "求和"
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   240
      TabIndex        =   2
      Top             =   1320
      Width           =   1935
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   855
      Left            =   2520
      TabIndex        =   1
      Top             =   0
      Width           =   1935
   End
   Begin VB.Label Label1 
      Caption         =   "輸入N值"
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   240
      TabIndex        =   0
      Top             =   120
      Width           =   2055
   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()
Dim i As Integer, s As Integer, n As Integer
n = Text1.Text
top:
i = i + 1
s = s + i
If i = n Then
GoTo c1
Else
GoTo top
End If
c1:
Text2.Text = s
End Sub