比较两个小数 [英] Comparing two decimals

问题描述

我想比较c＃中的两位小数和一定的误差范围。任何人都可以指出以下代码有问题。请注意，之后我对6个小数位感兴趣，因此可以忽略这些值。

I want to compare two decimals in c# with some margin of error. Can anyone point out problem with the following code. Note that I am interested in 6 decimal places after that I could ignore the values.

var valOne = decimal.Round(valueOne, 6);
var valTwo = decimal.Round(valueTwo, 6);
var difference = Math.Abs(valOne - valTwo);
if (difference > 0.0000001m) {
   Console.WriteLine("Values are different");
}
else {
    Console.WriteLine("Values are equal");
}

还是有更好的方法。

推荐答案

我认为，如果我不使用Round，那么此解决方案就可以了。

I think if I don't use Round then this solution is fine.

var valOne = 1.1234560M; // Decimal.Round(1.1234560M, 6);  Don't round.
var valTwo = 1.1234569M; // Decimal.Round(1.1234569M, 6);  Don't round

if (Math.Abs(valOne - valTwo) >= 0.000001M) // Six digits after decimal in epsilon
{
    Console.WriteLine("Values differ");
}
else
{
    Console.WriteLine("Values are the same");
}

如上所述，对于六个小数位，两个小数可以相差的最小值是0.000001M。小于此的任何值都可以安全地忽略。我认为此解决方案很好，但是如果有人认为我错过了某些事情，我感谢您的帮助。

As mentioned above for six decimal places the smallest amount the two decimals can differ is 0.000001M. Anything less than that can be safely ignored. I think this solution is fine but if anyone thinks I have missed something I appreciate your help.

谢谢

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