净四舍五入问题

编程入门行业动态更新时间:2024-10-23 15:31:13

本文介绍了净四舍五入问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我有净内部的四舍五入问题。

I have a rounding issue inside of .Net.

我四舍五入3位数字下降到两位数字，它会引起一些问题，一个数字。

I am rounding a 3 digit number down to two digits and it is causing some problems with one number.

如果我试图轮34.425到小数点后两位，应该是四舍五入至34.43。我现在用的是roundawayfromzero选项，它在程序中，除了这一个至今就职于每个数字。

If I try to round 34.425 to two decimal places it should round it to 34.43. I am using the roundawayfromzero option and it has worked for every number in the program except for this one so far.

在code Math.Round（34.425，2，MidpointRounding.AwayFromZero）但是应该等于34.43，它等于34.42。

The code Math.Round(34.425, 2, MidpointRounding.AwayFromZero) should equal 34.43 however, it equals 34.42.

如果我尝试用任何其他数字，它工作正常。

If I try this with any other number it works fine.

Math.Round(34.435, 2, MidpointRounding.AwayFromZero) = 34.44 Math.Round(34.225, 2, MidpointRounding.AwayFromZero) = 34.23 Math.Round(34.465, 2, MidpointRounding.AwayFromZero) = 34.47

我只是想检查，看看是否有人以前碰到这个问题？

I just wanted to check to see if anyone has run into this problem before?

有关，现在我已经通过数转换为十进制解决了这个问题。我已经改变了code到这一点，它工作正常现在：

For right now I have fixed this problem by converting the number to a decimal. I have changed the code to this and it works fine now:

Math.Round(CDec(34.425), 2, MidpointRounding.AwayFromZero) = 34.43

我只是在寻找为什么我的旧code没有工作的理由。

I am just looking for a reason on why my old code did not work.

感谢您！

更新了code为正确AwayFromZero

Updated the code to the correct AwayFromZero

推荐答案

浮点从来都不是确切的，34.425可能有一个内部的重新presantation 34.4249999999999 ..这将四舍五入至34.42。