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原来是这样

Posted by bug27 at 2007-02-23 15:27:51 on Problem 2799
In Reply To:这个题有什么trick么？ Posted by:bug27 at 2007-02-23 14:27:18 
unsigned x,i;
x=x<<i; //这句当i>=32的时候移位就不会进行了
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