是161803398 A'特殊'号？里面的Math.random（）的 [英] Is 161803398 A 'Special' Number? Inside of Math.Random()
问题描述
我怀疑，答案是数学，因为'，但我希望有人能在一个基本水平多加一点见解... 的
I suspect the answer is 'Because of Math', but I was hoping someone could give a little more insight at a basic level...
我今天闲逛在BCL源$ C $ C，有一个看看如何一些我以前用过的类被实际执行。我从来没有想过如何随机数之前产生（伪），所以我决定，看它是怎么做的。
I was poking around in the BCL source code today, having a look at how some of the classes I've used before were actually implemented. I'd never thought about how to generate (pseudo) random numbers before, so I decided to see how it was done.
在这里完整的源：<一href="http://referencesource.microsoft.com/#mscorlib/system/random.cs#29">http://referencesource.microsoft.com/#mscorlib/system/random.cs#29
private const int MSEED = 161803398;
这MSEED值，使用的每一个随机（）类接种时间。
This MSEED value is used every time a Random() class is seeded.
不管怎样，我看到了这个神奇数字 - 161803398 - 我没有为什么，这个数字被选中的foggiest想法。它不是一个质数或2的乘方它不是中途为一个数字，显得比较显著。我的二进制和十六进制看了一下，好了，它只是看起来像一个号码给我。
Anyway, I saw this 'magic number' - 161803398 - and I don't have the foggiest idea of why that number was selected. It's not a prime number or a power of 2. It's not 'half way' to a number that seemed more significant. I looked at it in binary and hex and well, it just looked like a number to me.
我试图寻找在谷歌的数字，但我什么也没找到。
I tried searching for the number in Google, but I found nothing.
推荐答案
没有，但它是基于披（以下简称黄金比例）。
No, but it's based on Phi (the "golden ratio").
161803398 = 1.61803398 * 10^8 ≈ φ * 10^8
And a really good read for the casual mathematician here.
，我发现的研究论文对随机数生成器的那同意这一说法。 （见第53页。）
And I found a research paper on random number generators that agrees with this assertion. (See page 53.)
这篇关于是161803398 A'特殊'号？里面的Math.random（）的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
