实现上述功能的VB程序如下，但横线处代码有错，请改正。

Private Sub Command1_Click()

    Dim a As String

    Dim x As Integer, s As Integer, k As Integer

    a = Text1.Text

    x = 1: s = 0: k = 0

    For i = 1 To Len(a)

        '如果输入的不是0到9的数字或者空格，则给出错误提示后结束子程序

        If (Asc(Mid(a, i, 1)) < 48 Or Asc(Mid(a, i,1)) > 57)  or(Asc(Mid(a,i,1))= 32)  then’{#blank#}1{#/blank#}Label1.Caption = "只能输入数字或空格"

            Exit Sub

        End If

        If Mid(a, i, 1) = " " Then

            s = s + Mid(a,x,i)’{#blank#}2{#/blank#}

            x = i + 1

            k = k + 1

        End If

    Next i

    Label1.Caption = "这" + Str(k) + "个数的和为:" + Str(s)

End Sub

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 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（  ）

①16/len("ab"）**2              

②abs(round(-1.7)*2)%8     

③chr(ord("0")+4)               

④int(str(1010+90)[1:4])//25