在十进制数据类型进行数学运算在C＃中？ [英] Performing Math operations on decimal datatype in C#?

问题描述

我在想，如果上面的是在所有可能的。例如：

I was wondering if the above was at all possible. For example:

Math.Sqrt(myVariableHere);

当在超载看，它需要一个双参数，所以我不知道是否有另一种方式与十进制数据类型复制此。

When looking at the overload, it requires a double parameter, so I'm not sure if there is another way to replicate this with decimal datatypes.

推荐答案

在大多数情况下涉及小数（货币等），它不是的有用的拿根;和根不会有像预期的precision什么，你可能会想到小数有。

In most cases involving a decimal (currency etc), it isn't useful to take a root; and the root won't have anything like the expected precision that you might expect a decimal to have. You can of course force it by casting (assuming we aren't dealing with extreme ends of the decimal range):

decimal root = (decimal)Math.Sqrt((double)myVariableHere);

这迫使你至少承认固有的四舍五入问题。

which forces you to at least acknowledge the inherent rounding issues.

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