form1.frm

VB写的利用蒙特卡洛计算圆周率,希望对大家学习蒙特卡洛方法提供帮助.

VERSION 5.00
Begin VB.Form Form1 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "计算圆周率"
   ClientHeight    =   1620
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   5220
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   1620
   ScaleWidth      =   5220
   StartUpPosition =   1  'CenterOwner
   Begin VB.CommandButton Command1 
      Caption         =   "计算"
      Height          =   1095
      Left            =   4320
      TabIndex        =   2
      Top             =   240
      Width           =   615
   End
   Begin VB.TextBox Text2 
      Height          =   495
      Left            =   1200
      TabIndex        =   1
      Top             =   840
      Width           =   2895
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   1200
      TabIndex        =   0
      Top             =   240
      Width           =   2895
   End
   Begin VB.Label Label2 
      Caption         =   "圆周率"
      Height          =   255
      Left            =   240
      TabIndex        =   4
      Top             =   960
      Width           =   735
   End
   Begin VB.Label Label1 
      Caption         =   "随机点数"
      Height          =   255
      Left            =   240
      TabIndex        =   3
      Top             =   360
      Width           =   735
   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()
On Error Resume Next
Randomize
Dim n As Long
Dim i As Long
Dim x As Double
Dim y As Double
n = 0
If Val(Text1.Text) < 1 Then Exit Sub
For i = 1 To Val(Text1.Text)
x = Rnd
y = Rnd
If (x * x + y * y <= 1) Then n = n + 1
Next i
Text2.Text = Str(4 * n / Val(Text1.Text))
End Sub