按位操作限制？ [英] Bitwise Operation limitation?

问题描述

我想对一些大整数进行逐位运算。


例如，


Response.Write CBool​​（2 AND 2 ^ 30）''返回False

Response.Write CBool​​（2和2 ^ 31）''崩溃！


看起来AND运算符只能处理整数高达2147483647？

有没有办法让AND运算符使用更大的整数，例如

double数据类型？

解决方案

David R.写道：

我想对一些大整数进行逐位运算。

例如，

Response.Write CBool​​（2和2 ^ 30）''返回False
Response.Write CBool​​（2 AND 2 ^ 31）''崩溃！

看起来像AND运算符只能处理整数到2147483647？有没有办法让AND运算符以更大的整数运行
，例如double数据类型？

单程：

<％@ Language = VBScript％><％


Response.Write（JSAnd（1234562,2 ^ 36-1））


％>< script runat =" server" language =" jscript">

函数JSAnd（a，b）{return a& b}

< / script>


-

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> Response.Write CBool​​（2 AND 2 ^ 31）''崩溃了！

看起来AND运算符只能处理高达2147483647的整数？

这与And运算符无关。


VBScript使用的最大整数长度是4字节长或32位。

但是这是一个有符号整数，所以范围是2 ^ 31-1到 - （2 ^ 31）。


试试这个： -


Response.Write CBool​​（2和& h80000000）


如果你正在进行按位操作而你想翻转最后一位使用： -


x = x或& H80000000''On

x = x和& H7FFFFFFF''关闭


Anthony。

I want to do bitwise operation on some large integers.

For example,

Response.Write CBool(2 AND 2^30) '' returns False
Response.Write CBool(2 AND 2^31) '' CRASHED!

Looks like the AND operator can only deal with integers up to 2147483647?
Is there a way to make the AND operator work with larger integers, such as
the double datatype?

解决方案

David R. wrote:

I want to do bitwise operation on some large integers.

For example,

Response.Write CBool(2 AND 2^30) '' returns False
Response.Write CBool(2 AND 2^31) '' CRASHED!

Looks like the AND operator can only deal with integers up
to 2147483647? Is there a way to make the AND operator work
with larger integers, such as the double datatype?

One way:

<%@ Language=VBScript %><%

Response.Write(JSAnd(1234562,2^36-1))

%><script runat="server" language="jscript">
function JSAnd(a,b) { return a & b }
</script>

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me directly or ask me to contact you directly for assistance. If your
question is worth asking, it''s worth posting.

> Response.Write CBool(2 AND 2^31) '' CRASHED!

Looks like the AND operator can only deal with integers up to 2147483647?

This has nothing to do with the And operator.

The maximum length of integer that VBScript uses is 4-bytes long or 32 bits.
However this is a signed integer so the range is 2^31-1 down to -(2^31).

Try this:-

Response.Write CBool(2 and &h80000000)

If you are doing bitwise operations and you want to flip the top bit use:-

x = x Or &H80000000 '' On
x = x And &H7FFFFFFF '' Off

Anthony.

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