For i = 1 To 3

 For j = 1 To 10

  If j Mod i = 0 Then a(j) = 1 - a(j)

 Next j

Next i

sum = 0

For i = 1 To 10

 sum = sum + a(i)

Next i

已知数组a的所有元素初值均为0，运行上述程序段后，变量sum的值是（  ）

x=-4.2

y=Abs(Int(x))

If x＞0 And x＜5 Then

 y=y+1

Else

 y=y-1

End If

该程序段运行后，y的值为（  ）

    s = Text1.Text: sum = 0: t = 0: cnt = 1

    For i = 1 To Len(s)

      c = Mid(s, i, 1)

      If c >= "0" And c <= "9" Then

        j=j+1

      Else

        If cnt Mod 2 = 1 Then sum = sum + val(mid(s,i-j,j))

        j= 0：cnt = cnt + 1

      End If

    Next i

在文本框text1输入“12d6a3c4f20”，程序运行后sum的值是（  ）