添加浮点数的奇怪结果 [英] Strange result with floating point addition

问题描述

为什么我打印/显示结果

Why is it when I print/display the result of

eval("11.05") + eval("-11")

它出现为0.05000000000000071而不是预期的0.05。有什么我想念的吗？

it comes out as 0.05000000000000071 instead of the expected 0.05. Is there something I am missing?

推荐答案

这与 eval 。事实上，如果您输入控制台会发生这种情况 11.05 - 11 ：


This has nothing to do with eval. In fact, this is what happens if you type in a console 11.05 - 11:

这是编程语言如何存储浮点数的结果;它们包含一个小错误。如果您想了解更多相关信息，请查看此信息。

This is a consequence of how programming languages store floating-point numbers; they include a small error. If you want to read more about this, check this out.

这篇关于添加浮点数的奇怪结果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！