利用Matlab计算小数除法时，计算结果出现问题

Question

远东谢 2023-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/1927615-matlab

回答： Abhijeet 2023-4-6

计算2.47/0.01时，输出247.0000，此时对结果使用ceil函数，得到的结果是278。但是计算2.471/0.001和24.7/0.1时均直接得到整数结果。

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Answer 1

Abhijeet 2023-4-6

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Hi,

You have encountered a round-off error that demonstrates a fundamental problem with the way computers deal with fractional numbers. Some numbers (in fact, "most" of them) cannot be represented exactly in binary form -- specifically, fractional numbers that are not powers of two. This will occur in any computer program using ANSI/IEEE standard math.

You can refer to this answer for the same.

Thanks