2012年計算機(jī)二級VB考試重點(diǎn)知識十五

　　9.3 數(shù)組應(yīng)用例題

　　1. 排序

　　例5-3 選擇排序法、直接排序法

　　Option Explicit

　　Option Base 1

　　Private Sub CmdSort_Click()

　　Dim Sort(10) As Integer, Temp As Integer

　　Dim I As Integer, J As Integer

　　Randomize

　　For I = 1 To 10

　　Sort(I) = Int(Rnd * (100 - 1)) + 1

　　Text1 = Text1 & Str(Sort(I))

　　Next I

　　For I = 1 To 9

　　For J = I + 1 To 10

　　If Sort(I) > Sort(J) Then

　　Temp = Sort(I)

　　Sort(I) = Sort(J)

　　Sort(J) = Temp

　　End If

　　Next J

　　Text2 = Text2 & Str(Sort(I))

　　Next I

　　Text2 = Text2 & Str(Sort(10))

　　End Sub

　　Option Explicit

　　Option Base 1

　　Private Sub CmdSort_Click()

　　Dim Sort(10) As Integer, Temp As Integer

　　Dim I As Integer, J As Integer

　　Dim Pointer As Integer

　　Randomize

　　For I = 1 To 10

　　Sort(I) = Int(Rnd * (100 - 1)) + 1

　　Text1 = Text1 & Str(Sort(I))

　　Next I

　　For I = 1 To 9

　　Pointer = I

　　For J = I + 1 To 10

　　If Sort(Pointer) > Sort(J) Then

　　Pointer = J

　　End If

　　Next J

　　If I <> Pointer Then

　　Temp = Sort(I)

　　Sort(I) = Sort(Pointer)

　　Sort(Pointer) = Temp

　　End If

　　Text2 = Text2 & Str(Sort(I))

　　Next I

　　Text2 = Text2 & Str(Sort(10))

　　End Sub

　　2. 查找

　　例：5-4 順序查找程序

　　先介紹For Each -next 結(jié)構(gòu)的語句：

　　Option Explicit

　　Option Base 1

　　Dim Search As Variant

　　Private Sub Cmd生成數(shù)組_Click()

　　Dim I As Integer, Element As Variant

　　Search = Array(34, 12, 56, 81, 59, 83, 91, 26, 47)

　　For Each Element In Search'for each-next 結(jié)構(gòu)語句

　　Text1 = Text1 & Str(Element)

　　Next Element

　　End Sub

　　Private Sub Cmd查找_Click()

　　Dim I As Integer, Find As Integer

　　Text2 = ""

　　Find = InputBox("輸入要查找的數(shù)")

　　For I = 1 To UBound(Search)

　　If Search(I) = Find Then Exit For

　　Next I

　　If I <= UBound(Search) Then

　　Text2 = "要查找的數(shù)" & Str(Search(I)) & "是Search(" & Str(I) & ")"

　　Else

　　Text2 = "在數(shù)列中沒有找到" & Str(Find)

　　End If

　　End Sub

　　例 5-5 二分查找程序：

　　Option Explicit

　　Option Base 1

　　Dim Search As Variant

　　Private Sub Cmd二分查找_Click()

　　Dim Left As Integer, Right As Integer

　　Dim Mid As Integer, Flg As Boolean

　　Dim Find As Integer

　　Find = InputBox("輸入要查找的數(shù)")

　　Left = 1: Right = UBound(Search)

　　Flg = False

　　Do While Left <= Right

　　Mid = (Left + Right) / 2

　　If Search(Mid) = Find Then

　　Flg = True

　　Exit Do

　　ElseIf Find > Search(Mid) Then

　　Left = Mid + 1

　　Else

　　Right = Mid - 1

　　End If

　　Loop

　　If Flg Then

　　Text2 = "要查找的數(shù)" & Str(Find) & "在Search(" & Str(Mid) & ")中"

　　Else

　　Text2 = Str(Find) & "不在數(shù)組中"

　　End If

　　End Sub

　　Private Sub Cmd生成數(shù)據(jù)_Click()

　　Dim V As Variant

　　Search = Array(12, 17, 23, 28, 30, 39, 41, 46, 57, 61, 78, 83, 85, 89, 93)

　　For Each V In Search

　　Text1 = Text1 & Str(V)

　　Next V

　　End Sub