IND和NAN编号有什么区别 [英] What is the difference between IND and NAN numbers

问题描述

NAN值表示不是数字，而IND值表示不确定的数字.但是两者之间有什么区别.我们如何用c ++表示两者.

A NAN value means Not A Number and IND value means Indeterminate number. But what is the difference between these two. How can we represent both in c++.

推荐答案

但是这两者之间有什么区别.

But what is the difference between these two.

他们都是同一回事.某些平台选择将非数字显示为NaN的某些变体，而其他平台选择将其显示为IND的某些变体.

They are both the same thing. Some platforms choose to display a non-number as some variant of NaN, while others choose to display it as some variant of IND.

我们怎么用c ++表示两者.

How can we represent both in c++.

std::numeric_limits<double>::quiet_NaN()(如果愿意，还可以是float或long double).

std::numeric_limits<double>::quiet_NaN() (or float or long double, if you prefer).

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