无意中发现VB For循环的一个特点
无意中发现VB For循环的一个特点：在循环体中，企图改变循环终止变量使之提前退出循环是徒劳的。
Private Sub Form_Load()
Dim s(0 To 4) As String
Dim N As Integer, i As Integer
s(0) = "测试1"
s(1) = "测试2"
s(2) = "测试3"
s(3) = "测试4"
s(4) = "测试5"
N = 4
For i = 0 To N
'在循环体中，企图改变循环终止变量使之提前退出循环是徒劳的。
'只有 判断【循环变量】是否大于【循环终止变量】来提前退出才是可行的，如：If i > N Then Exit For
Debug.Print s(i)
If i = 0 Or i = 3 Then N = N - 1
Next i
MsgBox "i====" & i & " N==" & N
End Sub
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