python函数可以返回列表吗_Python内置函数________可以返回列表、元组、字典、集合、字符串以及range对象中元素个数。...

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实现上述功能的VB代码如下。划线处的语句有错，应改为________。

'以下代码是将有效密文数字转换为十进制数的函数

Function conv(p As String)

As Integer

Dim k As Integer, q As String, i As Integer

k = 0: g = ""

For i = 1 To 3

q = Mid(p, i, 1)

①

Next i

conv = k

End Function

Private Sub

Command1_Click()

Dim st As String, p As String, res As String

Dim c1 As String, c2 As String, c3 As String

Dim i As Integer, d As Integer, n As Integer

st = Text1.Text: n = Len(st)

i = 1: res = ""

Do While i <= n – 2    '提取有效密文，并进行转换

c1 = Mid(st, i, 1): c2 = Mid(st, i + 1, 1):

c3 = Mid(st, i + 2, 1)

If c1

②

d=conv(p)

If d >= 32 And d <= 122 Then res =

res + Chr(d)

③

Else

i = i + 1

End If

Loop

Text2.Text = res

End Sub