实现上述功能的VB程序如下，但加框处代码有错误，请改正。

  Dim a(1 To 15) As Integer

Dim n As Integer 'n为计数器

Dim key As Integer 'key存放筛选条件的数字部分

Dim f As String 'f存放筛选天健的符号部分：大于号或者小于号

Private Sub FormLoad()

Randomize

For i = 1 To 15

a(i) = Int(Rnd * 100)

List1.AddItem Str(a(i))

Next i

 End Sub

Private Sub Command1Click()

Dim c As Integer

Dim st As String

n = 0

c = Len(st)

f = Mid(st, 1, 1)

If f = "<" Then Se2 '调用过程

If f = ">" Then Se1 '调用过程

Label2.Caption = "有" + Str(n) + "个筛选结果"

End Sub

Private Sub Se1() '筛选过程1

For i = 1 To 15

   If a(i) > key Then

      List2.AddItem Str(a(i))

      n = n + 1

   End If

Next i

End Sub

Private Sub Se2() '筛选过程2

For i = 1 To 15

List2.AddItem Str(a(i))

       n = n + 1

    End If

Next i

End Sub

实现上述功能的VB程序如下，请在划线处填入合适代码。

Private Sub Command1_Click()

  Dim i As Integer, n As Integer

  Dim x As Single, y As Single, x1 As Single, y1 As Single

  Dim d As Single, min As Single

  Dim s As String, t As String

  s = Text1.Text:   x = 25: y = 35                       'A点坐标

  n = 0: min = -1: t = ""

  For i = 1 To {#blank#}1{#/blank#}

    If Mid(s, i, 1) = "," Then

      n = n + 1

      If {#blank#}2{#/blank#} Then

         x1 = Val(t)

      Else

         y1 = Val(t)

         d = {#blank#}3{#/blank#}

         If min = -1 Then min = d

         If d < min Then min = d

      End If

      t = ""

    Else

      t = t + Mid(s, i, 1)

    End If

  Next i

  Label3.Caption = Str(min)

End Sub

Private Sub Text1_Change()

  Dim c As Integer, i As Integer

  i=0

  c = Val(Text1.Text)

  Do While c >= 0

    c = c - i

    i = i + 1

  Loop

  Text1.Text = Str(c)

End Sub

在文本框输入“6”，执行该程序段后， 其中c >= 0执行的次数是（  ）

Option Base 1

Private Sub Command1Click

     Dim a(4, 4)

     For i = 1 To 3

        For j = 1 To 3

             a(i, j)=(i-1)*3+j

        Next j

     Next i

     PRINT A(3, 1)

End Sub

程序运行后，单击命令按钮，其输出结果为（  ）