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C 代码的求解释

/div> flyaway 2018-10-20 00:10:06 +08:00 1982 次点击

这是一个创建于 2578 天前的主题，其中的信息可能已经有所发展或是发生改变。

最近在阅读 word2vec 的源码的时候，发现作者用了如下的代码来生成随机数，有没有了解 C 语言的朋友帮忙解释一下。我自己无法理解。

// Initalization unsigned long long next_random = 1; .... next_random = next_random * (unsigned long long)25214903917 + 11; random_value = (((next_random & 0xFFFF) / (real)65536) - 0.5) / layer1_size;

其中最后两行代码出现在每一个需要随机数的地方，有没有大神帮忙解释一下这段代码是怎么生成随机数的？这个随机数是什么样的分布？

2 条回复 2018-10-20 00:32:34 +08:00

1

dawn009

2018-10-20 00:24:27 +08:00

https://zhuanlan.zhihu.com/p/36301602

2

flyaway

OP

2018-10-20 00:32:34 +08:00

@dawn009 多谢，知道方向后就容易理解了

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