17.明明設(shè)計(jì)了某企業(yè)職工IC卡查詢(xún)系統(tǒng),輸入職工的卡號(hào),可以查出該卡號(hào)對(duì)應(yīng)的余額.所有職工的IC卡號(hào)和相應(yīng)的余額已分別保存在zg數(shù)組(按從小到大排序)和ye數(shù)組中,第i個(gè)職工卡號(hào)保存在zg(i)中,對(duì)應(yīng)的卡號(hào)余額保存在ye(i)中.
程序界面如圖所示,左邊列表框List1中顯示的是部分職工的卡號(hào)和余額,在文本框Text1中輸入職工的IC卡號(hào),單擊“查詢(xún)余額”按鈕(Command1)后,如果找到此卡號(hào),則在標(biāo)簽Lab3中顯示“此卡號(hào)余額為”和對(duì)應(yīng)的余額值,如果未找到則顯示“找不到此卡號(hào),請(qǐng)重新輸入”.
解決此問(wèn)題的部分程序段如下:
Const n=500'設(shè)卡號(hào)總數(shù)為500
Dim zg(1To n) As Long
Dim ye(1To n) As Single
Private Sub Form1_Load ( ?。?br />'此過(guò)程用于對(duì)數(shù)組zg和數(shù)組ye進(jìn)行初始賦值,代碼略
End Sub
Private Sub Command1_Click ( ?。?br />Dim x As Long,i As Long,j As Long,m As Long,find As Boolean
x=Val(Text1.Text)
i=1:j=n:find=False
Do While
①②If x=zg(m) Then
③ElseIf x<zg(m) Then
j=m-1
Else
i=m+1
End If
Loop
If find=true Then
Lab3.Caption=″此卡號(hào)余額為″+Str(ye(m))+″元″
Else
Lab3.Caption=″找不到此卡號(hào),請(qǐng)重新輸入″
End If
End Sub
在程序①、②、③橫線(xiàn)處填入適當(dāng)?shù)恼Z(yǔ)句或表達(dá)式.將程序補(bǔ)充完整:
(1)程序中①橫線(xiàn)處應(yīng)填入
.
(2)程序中②橫線(xiàn)處應(yīng)填入
.
(3)程序中③橫線(xiàn)處應(yīng)填入
.