016.frm

VB初级练习源码适合刚学习VB的人练习。。。。

VERSION 5.00
Begin VB.Form Form1 
   BackColor       =   &H000080FF&
   Caption         =   "1+1/2+1/3.....1/n"
   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            =   "宋体"
         Size            =   21.75
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   855
      Left            =   2640
      TabIndex        =   4
      Top             =   2160
      Width           =   1815
   End
   Begin VB.CommandButton Command1 
      Caption         =   "S="
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   42
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   120
      TabIndex        =   3
      Top             =   2160
      Width           =   1815
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   735
      Left            =   2640
      TabIndex        =   1
      Top             =   120
      Width           =   1815
   End
   Begin VB.Label Label2 
      BackColor       =   &H000080FF&
      Caption         =   "s=1+1/2+1/3+.....1/n"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   18
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   240
      TabIndex        =   2
      Top             =   1080
      Width           =   4695
   End
   Begin VB.Label Label1 
      BackColor       =   &H000080FF&
      Caption         =   "输入n值"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   1935
   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 x As Integer, y As Single
x = Text1.Text
y = 0
For i = 1 To x Step 1
    y = y + 1 / i
Next
Text2.Text = y
End Sub