form1.frm

Visual Basic程序设计视频教程

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   735
      Left            =   1200
      TabIndex        =   0
      Top             =   960
      Width           =   2175
   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 N As Integer
    N = Val(InputBox("请输入一个正整数"))
    If N < 1000 Then                 '判断是否为三位数
        If N < 100 Then              '判断是否为二位数
            If N < 10 Then           '判断是否为一位数
                MsgBox ("一位数")      ' 语句块 1-1
            Else
                MsgBox ("两位数")      ' 语句块 1-2
            End If
        Else
            MsgBox ("三位数")          '语句块2
        End If
    Else
        MsgBox ("三位数以上")          '语句块3
    End If
End Sub