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看来要找一个完美的O(1)的方法好难啊

Posted by cnhawk at 2007-08-17 13:48:12
In Reply To:Re:请教大家一个问题，想了很久不知道如何实现 Posted by:frkstyc at 2007-08-16 23:35:23 
> 分成4个字节查表，或者查到这个
> x|=x>>>1
> x|=x>>>2
> x|=x>>>4
> x|=x>>>8
> x|=x>>>16
> x^=x>>>1
>
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