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Re:n!计算的一些优化

Posted by butterfly at 2006-06-29 18:34:55 on Problem 1061
In Reply To:Re:n!计算的一些优化 Posted by:gemenhao at 2006-06-29 17:20:49
> vc6.0居然不支持 unsigend __int64 -> double 转换,比较恼火,
> 在我的AMD3200 64位机器上用__int64比用32位计算快,毕竟少了
> 3/4的乘法运算量,其实最快方法是
> 质因数分解,然后计算累计计算,300ms 可计算出123456!
> 去下载一个http://www.freewebs.com/maths/
> 测试一下就知道有多块!


G++支持unsigend __int64 -> double 转换的,呵呵

对了,64位机什么样哇,我还没见过呢

你说那个网址是不是国外的,我这儿上不去呀

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