有谁知道左移和右移操作员样本? 我是ASP的新手。我找到了比特运算符,如AND,OR,不仅仅是..
答案 0 :(得分:2)
对于vbscript,左移是通过乘法完成的(即,var * 2左移一个位置,var * 4左移两个位置,等等),右移是通过除法完成的(即var \ 16右移四位置)。
答案 1 :(得分:0)
http://www.blackwasp.co.uk/CSharpShiftOperators.aspx
这是C#,但是相同的运算符在最新版本的VB.Net中工作。
答案 2 :(得分:0)
vbscript中没有用于左右移动的直接方法,但是由于这是一组位中的每个数字向左或向右的简单移动,可以通过除以二进制10(整数2)来完成。是执行此操作的辅助方法
Function LeftShift(pValue, pShift)
Dim NewValue, PrevValue, i
PrevValue = pValue
For i = 1 to pShift
Select Case VarType(pValue)
Case vbLong
NewValue = (PrevValue And "&H3FFFFFFF") * 2
If PrevValue And "&H40000000" Then NewValue = NewValue Or "&H80000000"
NewValue = CLng(NewValue)
Case vbInteger
NewValue = (PrevValue And "&H3FFF") * 2
If PrevValue And "&H4000" Then NewValue = NewValue Or "&H8000"
NewValue = CInt("&H"+ Hex(NewValue))
Case vbByte
NewValue = CByte((PrevValue And "&H7F") * 2)
Case Else: Err.Raise 13 ' Not a supported type
End Select
PrevValue = NewValue
Next
LeftShift = NewVAlue
End Function
Function RightShift(pValue, pShift)
Dim NewValue, PrevValue, i
PrevValue = pValue
For i = 1 to pShift
Select Case VarType(pValue)
Case vbLong
NewValue = Int((PrevValue And "&H7FFFFFFF") / 2)
If PrevValue And "&H80000000" Then NewValue = NewValue Or "&H40000000"
NewValue = CLng(NewValue)
Case vbInteger
NewValue = Int((PrevValue And "&H7FFF") / 2)
If PrevValue And "&H8000" Then NewValue = NewValue Or "&H4000"
NewValue = CInt(NewValue)
Case vbByte
NewValue = CByte(PrevValue / 2)
Case Else: Err.Raise 13 ' Not a supported type
End Select
PrevValue = NewValue
Next
RightShift = PrevValue
End Function
有关更多信息,请参见http://chris.wastedhalo.com/2014/05/more-binarybitwise-functions-for-vbscript/