s1 = "00100100" : s2 = "" : flag = True
For i = Len(s1) To 1 Step -1
ch = Val(Mid(s1, i, 1))
If flag Then
s2 = Str(ch) + s2
If ch = 1 Then flag = False
Else
s2 = Str(1 - ch) + s2
End If
Next i
Label1.Caption = s2
执行该程序段后,标签Label1中显示的内容是( )