由网友(孤巷)分享简介：嘿，快速的问题：如何做一个.NET 十进制键入得到psented二进制在内存中再$ P $？ Hey all, quick question: How does a .NET decimal type get represented in binary in memory? 我们都知道浮点数存储和正是如此的原因，其...

嘿，快速的问题：如何做一个.NET 十进制键入得到psented二进制在内存中再$ P $？

Hey all, quick question: How does a .NET decimal type get represented in binary in memory?

我们都知道浮点数存储和正是如此的原因，其不准确，但我无法找到十进制除以下的信息：

We all know how floating-point numbers are stored and the thusly the reasons for the inaccuracy thereof, but I can't find any information about decimal except the following:

显然比浮点数更精确 采用128位的内存 2 ^ 96 +符号范围 28（有时29？）的数量总显著位数

有什么办法，我可以想出解决办法？在我的计算机科学家需要的答案，并试图研究一个小时后，我找不到它。好像有任何浪费许多位或者我只是想象这个错误在我的脑海。任何人都可以提供一些线索对这个好吗？谢谢你。

Is there any way I can figure this out? The computer scientist in me demands the answer and after an hour of attempted research, I cannot find it. It seems like there's either a lot of wasted bits or I'm just picturing this wrong in my head. Can anyone shed some light on this please? Thanks.

推荐答案

Decimal.GetBits对于信息你想要的。

Decimal.GetBits for the information you want.

基本上它是一个96位整数的尾数，再加上一个符号位，再加上一个指数，以说有多少的十进制的地方将它转移到右侧。

Basically it's a 96 bit integer as the mantissa, plus a sign bit, plus an exponent to say how many decimal places to shift it to the right.

因此​​，要重新present 3.261你有3261尾数，0（即正）符号位，和3。需要注意的是十进制的指数是不归（故意），这样你就可以也的重新present 3.2610通过使用32610尾数和4的指数，例如

So to represent 3.261 you'd have a mantissa of 3261, a sign bit of 0 (i.e. positive), and an exponent of 3. Note that decimal isn't normalized (deliberately) so you can also represent 3.2610 by using a mantissa of 32610 and an exponent of 4, for example.

我在我的十进制浮点文章更多的信息。

I have some more information in my article on decimal floating point.