flag=True
Key=Val(Text1.Text)
i=1
Do While i<=8 And flag
If a(i)=Key Then
flag=False
Else
i=i+1
End If
Loop
If Not flag Then
Label1.Caption=“Find！”
Else
Label1.Caption=“Fail！”
End If
数组元素a(1)到a(8)的数据依次为“11，2，0，6，8，3，5，8”，程序运行时，在文本框Text1中输入8，则在标签Label1中显示的内容是( )
key = Val(Text1.Text)
i = 1: j = 10
Text2.Text = “ ”
Do While i <= j
m = Int((i + j) / 2 + 0.5)
If key = a(m) Then Exit Do 'Exit Do表示退出循环
If key < a(m) Then j = m - 1 Else i = m + 1
Text2.Text = Text2.Text + Str(a(m))
Loop
数组元素a(1)到a(10)的值依次为“8，17，24，30，36，40，55，58，61，66”，文本框Text1中输入的值是30，执行该程序段，文本框Text2中显示的是( )
i = 1: j = 7: s = “ ”
key = Int(Rnd * 100)
Do While i <= j
m = (i + j) \ 2
If key = a(m) Then
s = s + “M”： Exit Do 'Exit Do 表示退出循环
ElseIf key < a(m) Then
j = m - 1: s = s + “L”
Else
i = m + 1: s = s + “R”
End If
Loop
Text1.Text = s
数组元素a(1)到a(7)的值依次为“24，35，38，41，45，69，78”。若该程序段执行后，文本框Text1中显示的内容可能是( )
i = 1: j = 10
Key = Val(Text1.Text)
Do While i <= j
m = (i + j) \ 2
If a(m) = Key Then Exit Do ′Exit Do表示退出循环
If Key Mod 2 = 1 And a(m) Mod 2 = 0 Then
ElseIf Key Mod 2 = 0 And a(m) Mod 2 = 1 Then
Else
End If
Loop
If i > j Then s = “没有找到！” Else s = “位置：” + Str(m)
Text2.Text = s
上述程序中方框处可选语句为：
①i = m + 1
②j = m - 1
③If Key < a(m) Then j = m - 1 Else i = m + 1
则(1)、(2)、(3)处语句依次是( )
Dim a As String, b As String, p As String, s As String
a = Text1.Text
b = Text2.Text
c = Text3.Text
p = “ ”
For i = 1 To Len(a)
If b = Mid(a, i, Len(b)) Then
s = s + c
p = p + Str(i)
Else
s = s + Mid(a, i, 1)
End If
Next i
Label1.Caption = p
若文本框Text1中输入“Hello，Python！I use Python！”，文本框Text2中输入“Python”， 文本框Text3中输入“VB”运行该段程序后，标签Label1中显示的是( )
i = 1: j = 9: n = 0
key = Val(Text1.Text)
Do While i<= j
n = n + 1
m = Fix((i + j) / 2)
If key = d(m) Then Exit Do 'Exit Do表示退出循环
If key < d(m) Then j = m - 1 Else i = m + 1
Loop
数组元素d(1)到d(9)的值依次为“7，12，18，25，39，58，61，72，86”。若该程序段运行结束后，n的值为2，则key的值是( )
i = 1: j = 10
flag = False
Do While i <= j And Not flag
m = (i + j + 1) \ 2
If a(m) < a(m - 1) And a(m) > a(m + 1) Then
ElseIf a(m) > a(m - 1) And a(m) > a(m + 1) Then
ElseIf a(m) > a(m - 1) And a(m) < a(m + 1) Then
End If
Loop
List1.AddItem Str(a(m)) +Str(m)
上述程序方框处可选句为：
①i=m+1
②j=m-1
③flag = True
则①②③处语句依次是( )
算法说明：
1)英语单词存放在数组words中。
2)如果在数组words中找到要查找的单词，则在标签Label4中显示“查找成功！”，并显示单词在数组words中出现的次数，如果未找到则显示“无此单词，请重输！”。
实现上述功能的VB程序如下，请在程序划线处填入合适的语句。
Dim n As Integer
Dim words(1 To 100) As String
Private Sub Command1_Click()
Dim key As String, i As Integer, times As Integer
key = Text1.Text
times = 0
For i = 1 To n
If key=words(i) Then
Next i
If times > 0 Then
Label4.Caption=“查找成功！共找到”+ +“个”
Else
Label4.Caption = “无此单词，请重输！”
End If
End Sub
Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim word As String
word = Text1.Text
If KeyAscii = 13 Then
n = n + 1
List1.AddItem Str(n) + “：” + word
Text1.Text = “ ”
End If
End Sub
程序界面如下图所示，程序运行时，在文本框Text1中输入一段文本，在文本框Text2中输入查找的字符串，在文本框Text3中输入替换为的字符串，单击“查找替换”按钮Command1，则在文本框Text4中输出替换后的文本，在标签Label6中显示替换的次数。
实现上述功能的VB程序如下，请在程序划线处填入合适的代码。
Private Sub Command1_Click()
Dim st1 As String, st2 As String
Dim i As Integer, n As Integer, count As Integer
Dim st3 As String, ch As String, result As String
result = “ ”
st1 = Text1.Text
st2 = Text2.Text
st3 = Text3.Text
len1 = Len(Text2.Text)
result = “ ”
i = 1
Do While i <= n
If ch = st2 Then
result = result + st3
count = count + 1
i = i + len1
Else
i = i + 1
End If
Loop
Text4.Text = result
Label6.Caption = Str(count)
End Sub
为实现上述的功能的程序如下，加框处的代码有误，请改正。
Dim book(1 To 20) As String, st As String
Const n = 20
Private Sub Form_Load()
'读入n个数据，存储在数组book中，并显示在列表框List1中
End Sub
Private Sub Command1_Click()
Dim i As Integer, j As Integer, len1 As Integer, len2 As Integer，k As Integer
st = Text1.Text
List2.Clear
len1 = Len(st)
k = 0
For i = 1 To n
len2 = Len(book(i))
'①
Do While j <= len2 - len1 + 1
If 
Then '②
List2.AddItem book(i)
k = k + 1
End If
j = j + 1
Loop
Next i
If k> 0 Then
List2.AddItem “共找到”+Str(k) + “条信息”
Else
List2.AddItem “查无此书”
End If
End Sub
程序中加框①处应改正为；
加框②处应改正为。
为实现上述功能的程序如下，请在划线处填入合适的语句或代码。
Dim xm1(1 To 20) As String, xh1(1 To 20) As String′数组xm1、xh1分别存储选报课程1的学生的姓名和学号
Dim xm2(1 To 30) As String, xh2(1 To 30) As String′数组xm2、xh2分别存储选报课程2的学生的姓名和学号
Const n = 20, m = 30
Private Sub Form_Load()
'获取选报数据，并显示在列表框List1和List2中
'代码略
End Sub
Private Sub Command1_Click()
Dim i As Integer, j As Integer, tt As String
List2.Clear
For i = 1 To m - 1
For j =Step -1
If xm2(j) < xm2(j - 1) Then
tt = xm2(j): xm2(j) = xm2(j - 1): xm2(j - 1) = tt
tt = xh2(j): xh2(j) = xh2(j - 1): xh2(j - 1) = tt
End If
Next j
Next i
For i = 1 To m
List2.AddItem xh2(i) + “ ” + xm2(i)
Next i
End Sub
Private Sub Command2_Click()
Dim i As Integer, j As Integer, w As Integer, tt As String, k As Integer
For i = 1 To n
p = 1
Do While p <= q
w = (p + q) \ 2
If xm1(i) = xm2(w) Then
List3.AddItem xh1(i) + “ ” + xm1(i)
k = k + 1
End If
If Then
q = w - 1
Else
p = w + 1
End If
Loop
Next i
List3.AddItem “共有” + Str(k) + “ 位同学”
End Sub
实现上述功能的VB程序如下，请在划线处填入合适的语句。
Function f(x As Double) As Double
Dim y As Double
f = y
End Function
Private Sub Command1_Click()
Dim a As Double, b As Double, m As Double, x As Double
a = Val(Text1.Text)
b = Val(Text2.Text)
If f(a) * f(b) < 0 And a < b Then
Do While a <= b
If Abs(f(m)) < 0.00001 Then Exit Do
If Then
b = m
Else
a = m
End If
Loop
x = Format(m, “0.00000”) ′Format函数用于定义输出的小数位数
List1.AddItem “[” & Text1.Text & “，” & Text2.Text & “]” & “解为：” & x
Else
List1.AddItem “[“ & a & ”，“ & b & ”]” & “请重新输入区间”
End If
End Sub
