Dim i As Integer, n As Integer, k As Integer, s As String n = Val(Text1.Text)：k = 1: s = ""
Do While 2 ^k < n
k = k + 1
Loop
Do While n <> 0
If n >= 2 ^ (k -1) Then s = s + "1"
n = n - 2 ^ (k -1)
Else
s = s + "0"
End If
k = k - 1
Loop
For i= 1 To k
s = s + "0"
Next i
在文本框Text1输入12，执行该程序段后，变量s、k的值分别为（ ）
