再来一个面试题 - hjtc - 博客园



再来一个面试题 - hjtc - 博客园

哎~ 情况继续恶化,电视台都来了~~~,原本一个运作正常的公司,突然就不行了。。。真是神马都是浮云。

继续来个面试题,倒是也不怎么无聊,就是不知道有啥用,不过做做题,心里还平静点。

 

话说题目是,用随机算法求PI,就是圆周那个PI。随机算法神马的从来都是用过,没写过,这里随便贴个线性同余法

    其中b >= 0,c >= 0,d <= m。d称为该随机序列的种子。如何选取该方法中的常数b、c和m直接关系到所产生的随机序列的随机性能。这是随机性理论研究的内容,已超出本书讨论的范围。从直观上看,m应取得充分大,因此可取m为机器大数,另外应取gcd(m, b) = 1,因此可取b为一素数。

 

理论的东西,不折腾了,老实说我也不会,这里直接用c库里的rand,种子也不初期化了。


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