Visual Basic中,对于文本比较好的处理方式.

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "统计试验法计算π值"
   ClientHeight    =   3075
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3075
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "重置"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   3360
      TabIndex        =   5
      Top             =   1560
      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            =   3120
      TabIndex        =   4
      Top             =   2520
      Width           =   1575
   End
   Begin VB.CommandButton Command1 
      Caption         =   "统计"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   3360
      TabIndex        =   2
      Top             =   960
      Width           =   975
   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            =   3240
      TabIndex        =   1
      Top             =   360
      Width           =   1095
   End
   Begin VB.Label Label2 
      Caption         =   "π的试验值"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   3240
      TabIndex        =   3
      Top             =   2160
      Width           =   1215
   End
   Begin VB.Label Label1 
      Caption         =   "随机点总数"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   3240
      TabIndex        =   0
      Top             =   120
      Width           =   1215
   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 Double, y As Double
    Randomize
    n = 0
    s = Val(Text1.Text)
    For i = 1 To s
        x = Rnd
        y = Rnd
        PSet (2500 * x, 2500 * y), RGB(0, 255, 0)
        If x * x + y * y <= 1 Then
            n = n + 1
        End If
    Next i
    Text2.Text = 4 * n / s
End Sub
Private Sub Form_Load()
    Show
                                   '画线和圆弧
    Line (0, 2500)-(2500, 2500), RGB(255, 0, 0)
    Line (2500, 0)-(2500, 2500), RGB(255, 0, 0)
    Circle (0, 0), 2500, RGB(0, 0, 255)
    Text1.SetFocus                 '设置焦点
End Sub
Private Sub command2_click()
    Text1.Text = ""
    Text2.Text = ""
    Cls
    Call Form_Load     '调用过程form_load
    Text1.SetFocus
End Sub