实现以上功能的VB程序如下,在横处填入合适的代码。

Dim a(1 To 20) As Integer     ‘存储区间的左端点数值

Dim b(1 To 20) As Integer     ‘存储区间的右端点数值

Private Sub Form_Load()

‘将区间左端点存入数组a,区间右端点存入数组b,并在列表框List1显示,代码略

End Sub

Private Sub Command1_Click()

Dim i As Integer, j As Integer

Dim curL As Integer, curR As Integer

For i=1 To n-1

 For j=1 To n-i

  If{#blank#}1{#/blank#}Then

   t=a(j): a(j)=a(j+1): a(j+1)=t

   t=b(j): b(j)=b(j+1): b(j+1)=t

  End If

 Next j

Next i

curL=a(1): curR=b(1)

For i=2 To n

 If{#blank#}2{#/blank#}Then

  If curR < b(i) Then{#blank#}3{#/blank#}

 Else

  List2.AddItem“["+Str(curL)+Str(curR)+"]”

  curL=a(i): curR=b(i)

 End If

Next i

List2. AddItem “[”+Str(curL)+Str(curR)+“]”

End Sub

实现上述功能的VB程序如下，请在划线处填入合适的代码。

Private Sub Command1_Click()

Dim a(1 To 10) As Integer    ‘存储0~9每个数字出现的次数

Dim b(1 To 26) As Integer    ‘存储a~z每个字母出现的次数

Dim zf As String, x As String, p As Integer

Dim maxa As Integer, maxb As Integer

{#blank#}1{#/blank#}

For i = 1 To Len(zf)

 x = Mid(zf, i, 1)

 If pd(x) = 1 Then

  p = Asc(x) - Asc(“0”) + 1

  a(p) = a(p) + 1

  {#blank#}2{#/blank#}

  p = Asc(x) - Asc(“A”) + 1

  b(p) = b(p) + 1

 Else

  p = Asc(x) - Asc(“a”) + 1

  b(p) = b(p) + 1

 End If

Next i

k = a(1):maxa = 1

For i = 2 To 10

 If a(i) > k Then k = a(i):maxa = i

Next i

k = b(1) :maxb = 1

For i = 2 To 26

 If{#blank#}3{#/blank#}Then k = b(i) :maxb = i

Next i

Label1.Caption =“出现最多的数字是” + Chr(maxa+ Asc(“0”)-1)

Label2.Caption = “出现最多的字母是” + Chr(maxb + Asc(“A”)-1)

End Sub

Function pd(ch As String) As Integer ’函数用于判断每个字符类型

 If ch >= “0” And ch <= “9” Then pd = 2

 If ch >= “A” And ch <= “Z” Then pd = 2

 If ch >= “a” And ch <= “z” Then pd = 3

End Function

小明依据上述描述设计了如下VB程序，在Text1中输入矩阵的行数n (n≤10)，单击“生成”按钮Command1，在List1中显示n×n的螺旋矩阵。请回答下列问题：

当窗体Form1加载时，自动产生a、b数组的数据，并分别显示在列表框List1与List2中，单击合并按钮Command1后，在c数组中保存按规则合并后的a、b数组的数据，并显示在列表框List3中。程序截图如下所示：

实现该功能的VB程序如下：

Const m = 5

Const n = 6

Dim a(1 To m) As Integer

Dim b(1 To n) As Integer

Dim c(1 To m + n) As Integer

‘窗体加载时，生成数组a、b中的数据，并按要求排序后显示在列表框中，代码略

Private Sub Command1_Click()

Dim pa As Integer, pb As Integer, pc As Integer, s As Integer, flag As Boolean

pa = m: pb = 1: pc = 1

flag = True

Do While      ①     

  If a(pa) < b(pb) Then

    s = a(pa)

    pa = pa - 1

  Else

    s = b(pb)

    pb = pb + 1

  End If

  c(pc) = s

  If flag Then

    pc = m + n - pc + 1

  Else

    pc =

  End If

       ②     

Loop

‘处理a、b数组中剩余数据，并在列表框List3中输出数组c，代码略

End Sub

Dim a (1 To 6) As Integer

Randomize

a(1) = Int (Rnd*2) + 1

For i = 2 To 6

  a(j) = Int (Rnd*i) *2 + 1

  If a(i) < a(i-1) Then

    a(i) = a(i) + a(i-1)

  End If

Next i

执行该程序段后，数组元素a(1)到a(6)的值可能是（  ）