Key=Val(Text1．Text)

  Text2．Text=“”

  flag=True

  i=1：j=8

  Do While i<=j And flag=True

    M=(i+j)＼2

    If key=a(m) Then

      flag=False

    ElseIf key>a(m)Then

      i=m+1

    Else

      j=m-1

    End If

    Text2．Text=Text2．Text+Str(m)

    Loop

数组元素a(1)到a(8)的值依次为“1，3，5，8，10，13，16，21，在文本框Text1中输入7，执行该程序段，下列说法正确的是（  ）

i = 1: j = 10: n = 0: flag = True

Key = Val(Text1.Text)

Do While i <= jAnd flag = True

    m = (i + j) \ 2

    If a(m) = Key Then

        flag = False

    ElseIf a(m) < Key Then

        i = m + 1

        n = n - 1

    Else

        j = m– 1

        n = n + 1

    End If

Loop

数组元素a(1)到a(10)的值依次是“5,16,22,28,35,43,52,67,78,89”，变量n的值最终是0，则文本框Text1输入的数值范围可能是（   ）

首先，分别求出特加密ASCII字符的ASCII码，然后用7位二进制来表示，比如“4”的ASCII码为十进制52，转换为7位二进制为“0110100”

其次，从左至右依次记为第1、2、3....7位，分别把第3、4、5位取反，即0变1， 1变0，至此“0110100”变为“0101000”，将此二进制转换为ASCII码为40，对应的字符为“(”，即“4”经过加密后得到加密字符左括号“(”。

在文本框Text1中输入ASCII字符，单击命令按钮Command，则在文本框Text2中显示经过加密的字符。VB代码如下，程序界面如图所示。

上述加密与解密过程实际上是可以互逆的，请完成下列问题。

加密规则如下表所示：

注：“A”的ASCⅡ码值是65，“a”的ASCI码值是97。

Private Sub Command1_Click()

Dim a(1 To 6) As Integer, b(1 To 6) As String, i as integer, j as integer

Dim c As String, k As Integer, tmp1 As Integer, tmp2 As String

s=text1.text

i = 1: k = 1: tmp1 = 0: tmp2 = ""

Do While i <= Len(s)

      c = Mid(s, i, 1)

      If c = "," Then

         a(k) = tmp1: b(k) = tmp2

         tmp1 = 0: tmp2 = ""

              ①    

      Else

        If  Then 

           tmp2 = tmp2 + c

        Else

         tmp1=tmp1*10+val(c)

        End If

      End If

      i = i + 1

    Loop

    For i = 1 To 5

      For j = 1 To 6 - i

        If a(j) > a(j + 1) Then tmp1 = a(j): a(j) = a(j + 1): a(j + 1) = tmp1

    If Len(b(j)) > Len(b(j + 1)) Or      ②       Then

          tmp2 = b(j): b(j) = b(j + 1): b(j + 1) = tmp2

        End If

      Next j

    Next i

    For i = 1 To 6

      List1.AddItem Str(a(i)) + b(i)

    Next i

    End Sub

Dim n As Integer, i As Integer, left As Integer, right As Integer, m As Integer

Dim a(1 To 10) As String, t As String, key As String n = 6

a(1) = "35": a(2) = "20": a(3) = "18": a(4) = "8": a(5) = "274": a(6) = "47" For i = 1 To n - 1

For j = n To i + 1 Step -1

If a(i) < a(j) Then

t = a(i): a(i) = a(j): a(j) = t

End If

Next j

Next i

key = Text1.Text

left = 1: right = n

Do While left <= right

m = (left + right) \ 2

If a(m) = key Then Exit Do

If a(m) < key Then right = m - 1 Else left = m + 1

Loop

若在文本框 Text1 中输入“212”，则程序运行结束后，m 的值为（  ）