flash as3 自动四舍五入数字
我写了一篇很长的文章试图解释我遇到的问题的确切细节，但我认为我会保持简单，并在这里提出一个示例问题：
var n1:Number = 9.99999999999999;
n1 += 0.000000000000009;
var n2:Number = n1 + 10;
var n3:Number = n1 - 10;
长话短说，n1 = 9.99....7，n2 = 20 ，n3 = 10。
如果我尝试对 n1 和 n3 进行比较，它们应该相同，但事实并非如此。我不在乎闪光是否围绕它，我只需要它们是相同的（它们不是，在一种情况下导致闪光，而不是另一种情况）。
对于这样的问题有一些标准的解决方案吗？
PS 我的数字不需要这种精度，但我也不想每次进行操作时都对数字的舍入进行微观管理（这似乎可以在混合中添加很多代码）。然而，如果这是唯一的解决方案，我想我只需在整个代码中进行大量舍入即可，哈哈。
I wrote out a long post trying to explain the exact details of the problem im having, but instead i think ill keep it simple, and ask an example question here:
var n1:Number = 9.99999999999999;
n1 += 0.000000000000009;
var n2:Number = n1 + 10;
var n3:Number = n1 - 10;
Long story short, n1 = 9.99....7, n2 = 20, n3 = 10.
If i try to make a comparison between n1 and n3, they should be the same but they arn't. I dont care if flash rounds it or not, i just need them to be the same (and they arn't, cause flash rounds in one case, and not the other).
Is there some standard solution for a problem like this?
P.S. I dont need this precision on my numbers, but i also would not like to micromanage the rounding of the numbers EVERY time i do a manipulation (that seems like it could add a LOT of code to the mix). If this is the only solution however, i guess ill just have to do a lot of rounding throughout the code, ha.
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flash中的
Number是一个双精度浮点数。请在此处阅读有关它们的更多信息。这些“问题”并不是闪存独有的，而只是与这些数字的存储方式有关。有几个选择。这是一个快速小库，用于模糊比较数字，在一定的误差范围内。另一种选择是实现定点数学库。
The
Numberin flash is a double precision floating point number. Read more here about them. These "problems" are not unique to flash, but just have to do with how these numbers are stored.There are a couple of options. Here is a quick little library for fuzzy comparing numbers, within a certain margin of error. Another option would be implement a fixed point math library.
如果你想比较，只用 int() 包装有问题吗？
Is it a problem to just wrap in int() if you're trying to compare?