例3.5.frm

一本学习Visual Basic编程的好书

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "计算圆的周长和面积"
   ClientHeight    =   2490
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   2490
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "结束"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   3240
      TabIndex        =   5
      Top             =   1320
      Width           =   975
   End
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   1440
      Locked          =   -1  'True
      TabIndex        =   2
      Text            =   " "
      Top             =   1440
      Width           =   1215
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   1440
      Locked          =   -1  'True
      TabIndex        =   1
      Text            =   " "
      Top             =   600
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "开始"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   3240
      TabIndex        =   0
      Top             =   720
      Width           =   975
   End
   Begin VB.Label Label3 
      Caption         =   "圆面积"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   600
      TabIndex        =   4
      Top             =   1560
      Width           =   855
   End
   Begin VB.Label Label2 
      Caption         =   "圆周长"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   600
      TabIndex        =   3
      Top             =   720
      Width           =   855
   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()       '“开始”
    Dim r As Single, k As Single, s As Single
    r = Val(InputBox("请输入圆的半径", "计算圆的周长和面积"))
    k = 2 * 3.14159 * r
    s = 3.14159 * r * r
    Text1.Text = k
    Text2.Text = s
    MsgBox "计算已完成", , "例3.8"
End Sub
Private Sub Command2_Click()       '“结束”
    End
End Sub