有如下 VB 程序段 Private Sub Command1_Click()
Const s1 = "efg"
s2 = "&auif,+eg$Ymfhe":s3 = ""
For i = 1 To Len(s2)
If being(Mid(s2, i, 1), s1) Then
s3 = s3 + Str(i) + ","
End If
Next i
Text1.Text = s3
End Sub
Function being(x As String, y As String) As Boolean
being = False
For i = 1 To Len(y)
If x = Mid(y, i, 1) Then
being = True:Exit Function
End If
Next i
End Function
执行后文本 Text1 中显示的内容是( )