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用VB 6.0編寫電腦抽獎(jiǎng)程序

[摘要]近年來在娛樂節(jié)目之中常常見到利用電腦來抽獎(jiǎng),筆者對(duì)其發(fā)生了興趣遂自己動(dòng)手用VB編了一個(gè)小程序來實(shí)現(xiàn)電腦抽獎(jiǎng)的小功能,其原理如下:  主要利用VB中的Rnd函數(shù),來實(shí)現(xiàn)隨機(jī)查找和打亂排序的功能,從而實(shí)...
近年來在娛樂節(jié)目之中常常見到利用電腦來抽獎(jiǎng),筆者對(duì)其發(fā)生了興趣遂自己動(dòng)手用VB編了一個(gè)小程序來實(shí)現(xiàn)電腦抽獎(jiǎng)的小功能,其原理如下:

  主要利用VB中的Rnd函數(shù),來實(shí)現(xiàn)隨機(jī)查找和打亂排序的功能,從而實(shí)現(xiàn)隨機(jī)抽獎(jiǎng)的目的。Rnd函數(shù)的語法結(jié)構(gòu)是Rnd[(number)],可選的number參數(shù)是 single或任何有效的數(shù)值表達(dá)式。Rnd函數(shù)返回小于1但大于或等于0的值。number 的值決定了 Rnd 生成隨機(jī)數(shù)的方式。為了生成某個(gè)范圍內(nèi)的隨機(jī)整數(shù),可使用以下公式:

Int((upperbound - lowerbound + 1) × Rnd + lowerbound)

  這里,upperbound 是隨機(jī)數(shù)范圍的上限,而 lowerbound 則是隨機(jī)數(shù)范圍的下限。

  另外,程序中還使用了INI文件,Windows INI文件,可解釋為Windows初始化文件。它是一種專門用來保存應(yīng)用程序初始化信息和運(yùn)行環(huán)境信息的文本文件。ini文件是一種文本文件,它可以通過Notepad等文本編輯器進(jìn)行編輯。ini文件具有特定的格式。一個(gè)INI文件是由若干個(gè)段(section)組成的,每個(gè)段中包含若干關(guān)鍵字(key)及相應(yīng)的值(value)。創(chuàng)建應(yīng)用程序自己的INI文件,通過INI文件保存應(yīng)用程序的一些運(yùn)行環(huán)境信息,然后在程序中讀取INI文件中的設(shè)置信息并據(jù)以處理。一旦程序的運(yùn)行環(huán)境需要變更,則可以通過直接修改INI文件,或在程序中提供專門的界面間接地修改INI文件來保證程序的可用性。


  源程序及注釋如下:

  '窗體源程序

Option Explicit
  Dim m_strNameArray() As MyName
  Dim m_bIsStart As Boolean
  Dim m_nNameIndex As Integer
  Dim MAX_INDEX As Integer
  Dim m_nSelectNum As Integer
   '被選定數(shù)
  Dim nScrollStep As Integer
  Dim nScrollWidth As Integer
  Dim bScrollState As Boolean
  Dim nEnableSecond As Integer
  Dim m_strTitle As String
  Dim m_strAppTitle As String
  Dim m_strScrollTitleLeft As String
  Dim m_strScrollTitleRight As String

Private Sub Command_Start_Stop_Click()
  If m_bIsStart = True Then
   '按停止鈕
   m_bIsStart = False
   Command_Start_Stop.Caption =
   “開始"
   Label_FlashName.Visible = True
   Timer_FlashName.Enabled = True
   Timer_ScrollName.Enabled = False
   Label_FlashName =
    m_strNameArray(m_nNameIndex).strName + “中獎(jiǎng)了!"
   m_strNameArray(m_nNameIndex).bIsSelect = True
   m_nSelectNum = m_nSelectNum + 1
   Dim Temp As MyName
   Temp =m_strNameArray(MAX_INDEX)
   m_str Name Array(MAX-INDEX) = m_strNameArray(m_nNameIndex)
   m_strNameArray(m_nNameIndex) =Temp
   MAX_INDEX = MAX_INDEX - 1
   If MAX_INDEX = 0 Then
    MsgBox “非常感謝您使用本軟件"
   End If
  Else '按開始鈕
   m_bIsStart = True
   Command_Start_Stop.Caption = “停止"
   Command_Start_Stop.Enabled = False
   Timer_ScrollName.Enabled = True
   Timer_FlashName.Enabled = False
   Label_FlashName.Caption = “"
  End If
End Sub

Private Sub Form_Load()
  Form_Bouns.ScaleMode = 3
  m_nNameIndex = 0
  m_bIsStart = False
  Timer_ScrollName.Enabled = True
  Timer_ScrollTitle.Enabled = True
  Label_FlashName.Visible = False
  Label_ScrollName.Caption = “"
  nEnableSecond = 0
  '定義起始秒數(shù)
  ReDimNameArray
  '獲得文本中的名字和打亂名字順序
  nScrollStep = 5 '設(shè)定滾動(dòng)字的步長(zhǎng)
  nScrollWidth = Label_Congruation.Left
  '設(shè)定title的移動(dòng)寬度
  bScrollState = False
  '設(shè)定缺省的開始滾動(dòng)方向?yàn)橄蜃?br>  m_nSelectNum = 0
  '初始化被選定數(shù)為0
  Init
  '初始化本程序的界面
End Sub

Private Sub Timer_FlashName_Timer() '閃動(dòng)中獎(jiǎng)?wù)咝彰?br>  If Label_FlashName.Visible = True Then
   Label_FlashName.Visible = False
  Else
   Label_FlashName.Visible = True
  End If
End Sub

Private Sub Timer_ScrollName_Timer() '滾動(dòng)出現(xiàn)名字
  If m_bIsStart = True Then
   If m_nNameIndex >= MAX_INDEX Then
    m_nNameIndex = 0
   End If
   m_nNameIndex =m_nNameIndex + 1
   If m_strNameArray(m_nNameIndex).bIsSelect = True Then
    If m_nNameIndex < MAX-INDEX Then
     m_nNameIndex =
     m_nNameIndex + 1
    Else
     m_nNameIndex = 0
    End If
   End If
   Label_ScrollName.Caption = m_str
   NameArray(m_nNameIndex).strName
   'End If
  End If
End Sub
  
Private Sub Timer_ScrollTitle_Timer() '滾動(dòng)“恭喜發(fā)財(cái)"字樣
  If bScrollState = False Then '向左滾
   nScrollStep = 10
   Label_Congruation.Caption = m_strScrollTitleLeft
   If nScrollWidth > 0 Then
    nScrollWidth =
    nScrollWidth - nScrollStep
   Else
    bScrollState = True
   End If
  Else '向右滾
   nScrollStep = -10
   Label_Congruation.Caption =
   m_strScrollTitleRight
   If nScrollWidth < Form_Bouns.ScaleWidth -
       Label_Congruation.Width Then
    nScrollWidth =
    nScrollWidth - nScrollStep
   Else
    bScrollState = False
   End If
  End If
  Label_Congruation.Left = nScrollWidth
  '以下為8秒鐘內(nèi)使“停止"按鈕有效
  If nEnableSecond <= 49 Then
   If m_bIsStart = True Then
    nEnableSecond =nEnableSecond + 1
   End If
  Else
   If m_bIsStart = True Then
    Command_Start_Stop.Enabled = True
    nEnableSecond = 0
   End If
  End If
End Sub

  '動(dòng)態(tài)定義數(shù)組

Private Sub ReDimNameArray()
  Dim nMaxIndex As Integer
  Dim strMaxIndex As String
  Dim nIndex As Integer
  Dim bIsBegin As Boolean
  bIsBegin = False
  nIndex = 0
  Open App.Path + “\name.txt" For Input As #1 '讀文件
  Do Until EOF(1)
   If bIsBegin = False Then
    Line Input #1, strMaxIndex
    nMaxIndex = Val(strMaxIndex)
    MAX_INDEX = nMaxIndex - 1
    ReDim m_strNameArray(0 To nMaxIndex - 1)
    bIsBegin = True
   Else
    Line Input #1, m_strNameArray(nIndex).strName
    m_strNameArray(nIndex).bIsSelect = False
    nIndex = nIndex + 1
   End If
  Loop
  '以下為打亂人員順序10次
  Dim i As Integer
  Dim j As Integer
  Dim Temp As String
  Dim nRandomNum As Integer
  For j = 0 To 10
   For i = 0 To nMaxIndex - 1
    nRandomNum = ((nMaxIndex - 1) × Rnd) '利用Rnd函數(shù)
    Temp = m_strNameArray(i).strName
   m_strNameArray(i).strName = m_strNameArray(nRandomNum).strName
    m_strNameArray(nRandomNum).strName = Temp
   Next i
  Next j
  End Sub
  
Private Sub Init() '讀取INI文件
  Dim X As Long
  Dim lpFileName
  Dim Temp As String × 50
  lpFileName = App.Path + “\Sortition.ini"
  X = GetPrivateProfileString(“SYSTEM",“AppTitle",“抽獎(jiǎng)程序", Temp, Len(Temp), lpFileName)
  m_strAppTitle = Trim(Temp)
  Temp =“"
  X = GetPrivateProfileString(“SYSTEM", "Title", "歡迎使用抽獎(jiǎng)程序", Temp, Len(Temp), lpFileName)
  m_strTitle = Trim(Temp)
  Temp = “"
  X = GetPrivateProfileString(“SYSTEM",“ScrollTitleRight", “恭喜發(fā)財(cái)!!!", Temp, Len(Temp), lpFileName)
  m_strScrollTitleRight = Trim(Temp)
  X = GetPrivateProfileString(“SYSTEM",“ScrollTitleLeft", “龍年大發(fā)!!!", Temp, Len(Temp), lpFileName)
  m_strScrollTitleLeft = Trim(Temp)
  Form_Bouns.Caption = m_strAppTitle
  Label_CompanyTitle.Caption = m_strTitle
  End Sub

  模塊源程序:

  '用于讀取ini文件的API函數(shù)
  Declare Function GetPrivateProfileString Lib “kernel32" Alias “GetPrivateProfileStringA" (ByVal lpApplicationname As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long
  Public Type MyName
   strName As String
   bIsSelect As Boolean
  End Type


  由于程序利用的windows ini文件保存一些標(biāo)題信息,因而可以方便的修改使用環(huán)境,及標(biāo)題內(nèi)容。

  見ini文件內(nèi)容:

 [SYSTEM]
   ;應(yīng)用程序的form名稱
   AppTitle=“風(fēng)云電腦抽獎(jiǎng)Test"
   ;窗口的內(nèi)的標(biāo)題(限9個(gè)字)
   Title=“大抽獎(jiǎng)"
   ;右滾動(dòng)的文字(僅能為如下格式:XXXX!!!)
     ScrollTitleRight=“恭喜發(fā)財(cái)!!!"
   ;左滾動(dòng)的文字(僅能為如下格式:XXXX!!!)
   ScrollTitleLeft=“祝您好運(yùn)!!!"


  如此一個(gè)小小的電腦抽獎(jiǎng)程序便完成了。

  以上程序在VB6.0 Windows98環(huán)境下編譯通過