题库 高中信息
题干
运行如下Visual Basic程序，单击命令按钮Command1，出现如图所示的出错信息。出错语句是（ ）
Private Sub Command1_Click()
Dim a(0 To 5) As Integer '①
Dim i As Integer
a(5) = 1
For i =" 4" To 0 Step -1 '②
a(i) =" 2" * a(i+1) +___1___'③
Next i
Text1.Text = Str(a(i)) '④
End Sub
Private Sub Command1_Click()
Dim a(0 To 5) As Integer '①
Dim i As Integer
a(5) = 1
For i =" 4" To 0 Step -1 '②
a(i) =" 2" * a(i+1) +___1___'③
Next i
Text1.Text = Str(a(i)) '④
End Sub
| A．① | B．② | C．③ | D．④ |
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