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谢谢帮忙，不过我是求（绝对值的）最大公约数，对于最大公约数来说，正负应该无所谓吧In Reply To:这个肯定影响啊，我觉得您应该这么写试试 Posted by:TN at 2005-05-03 12:13:21 > __int64 gcd(__int64 aa,__int64 bb) {
> //if (aa<0) aa=-aa;
> //if (bb<0) bb=-bb;
> if (aa==0) return bb;
> return gcd(（bb%aa+aa）%aa,aa);
> }
>
> -bb%aa和bb%aa不一样啊
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