frmrolldice.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmRollDice 
   Caption         =   "Fig. 6.18: Simulating rolling six-sided dice"
   ClientHeight    =   4980
   ClientLeft      =   2565
   ClientTop       =   1425
   ClientWidth     =   5040
   LinkTopic       =   "Form1"
   ScaleHeight     =   4980
   ScaleWidth      =   5040
   Begin VB.ListBox lstStatistics 
      Height          =   1425
      Left            =   285
      TabIndex        =   1
      Top             =   3450
      Width           =   4410
   End
   Begin VB.CommandButton cmdRoll 
      Caption         =   "Roll"
      Height          =   495
      Left            =   1935
      TabIndex        =   0
      Top             =   2790
      Width           =   1215
   End
   Begin VB.Image imgDie1 
      Height          =   645
      Left            =   330
      Top             =   210
      Width           =   810
   End
   Begin VB.Image imgDie4 
      Height          =   645
      Left            =   3855
      Top             =   210
      Width           =   810
   End
   Begin VB.Image imgDie2 
      Height          =   645
      Left            =   1515
      Top             =   210
      Width           =   810
   End
   Begin VB.Image imgDie7 
      Height          =   645
      Left            =   2745
      Top             =   1065
      Width           =   810
   End
   Begin VB.Image imgDie9 
      Height          =   645
      Left            =   330
      Top             =   1920
      Width           =   810
   End
   Begin VB.Image imgDie10 
      Height          =   645
      Left            =   1515
      Top             =   1920
      Width           =   810
   End
   Begin VB.Image imgDie11 
      Height          =   645
      Left            =   2745
      Top             =   1920
      Width           =   810
   End
   Begin VB.Image imgDie12 
      Height          =   645
      Left            =   3855
      Top             =   1920
      Width           =   810
   End
   Begin VB.Image imgDie8 
      Height          =   645
      Left            =   3855
      Top             =   1065
      Width           =   810
   End
   Begin VB.Image imgDie3 
      Height          =   645
      Left            =   2745
      Top             =   210
      Width           =   810
   End
   Begin VB.Image imgDie5 
      Height          =   645
      Left            =   330
      Top             =   1065
      Width           =   810
   End
   Begin VB.Image imgDie6 
      Height          =   645
      Left            =   1515
      Top             =   1065
      Width           =   810
   End
End
Attribute VB_Name = "frmRollDice"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 6.18
' Six-sided die simulation
Option Explicit    ' General declaration

' Declare module variables
Dim mFace1 As Integer, mFace2 As Integer   ' General declaration
Dim mFace3 As Integer, mFace4 As Integer   ' General declaration
Dim mFace5 As Integer, mFace6 As Integer   ' General declaration
Dim mTotalRolls As Integer                 ' General declaration

Private Sub cmdRoll_Click()
   mTotalRolls = mTotalRolls + 12
   
   Call DisplayDie(imgDie1, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie2, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie3, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie4, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie5, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie6, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie7, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie8, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie9, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie10, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie11, 1 + Int(6 * Rnd()))
   Call DisplayDie(imgDie12, 1 + Int(6 * Rnd()))
   
   Call lstStatistics.Clear
   Call DisplayStats
End Sub

Private Sub DisplayDie(imgDie As Image, face As Integer)
            
   Select Case face
      Case 1
         mFace1 = mFace1 + 1
      Case 2
         mFace2 = mFace2 + 1
      Case 3
         mFace3 = mFace3 + 1
      Case 4
         mFace4 = mFace4 + 1
      Case 5
         mFace5 = mFace5 + 1
      Case 6
         mFace6 = mFace6 + 1
   End Select

   imgDie.Picture = LoadPicture("d:\images\common\die" _
                                & face & ".gif")
End Sub

Private Sub DisplayStats()
   lstStatistics.AddItem "Face" & vbTab & "Frequency" & _
                         vbTab & "Percent"
   lstStatistics.AddItem 1 & vbTab & mFace1 & vbTab & vbTab & _
                         Format$(mFace1 / mTotalRolls, "Percent")
   lstStatistics.AddItem 2 & vbTab & mFace2 & vbTab & vbTab & _
                         Format$(mFace2 / mTotalRolls, "Percent")
   lstStatistics.AddItem 3 & vbTab & mFace3 & vbTab & vbTab & _
                         Format$(mFace3 / mTotalRolls, "Percent")
   lstStatistics.AddItem 4 & vbTab & mFace4 & vbTab & vbTab & _
                         Format$(mFace4 / mTotalRolls, "Percent")
   lstStatistics.AddItem 5 & vbTab & mFace5 & vbTab & vbTab & _
                         Format$(mFace5 / mTotalRolls, "Percent")
   lstStatistics.AddItem 6 & vbTab & mFace6 & vbTab & vbTab & _
                         Format$(mFace6 / mTotalRolls, "Percent")
End Sub