ostringstream插入程序是否使用当前语言环境？ [英] Does ostringstream inserter use current locale?

问题描述

要在没有科学符号的情况下将双精度转换为字符串，建议的方法是

To convert double to string without scientific notation, the suggested way is

std::ostringstream strStream;
strStream << std::fixed;
strStream << value;
std::string str = strStream.str();

与
在使用<<< & 如何在C ++？

我想将double转换为字符串，而无需使用任何分隔符，并且将Dot / Full-stop作为小数点，即忽略语言环境。

I want to convert double to string without any separator and Dot/Full-stop as the decimal point, i.e. ignoring locale.

来自 ostringstream 的描述， std :: fixed 和显示点，我无法确定

From description of ostringstream, std::fixed and showpoint, I couldn't determine

1. 小数点是否在当前语言环境中？和


2. str（）根据语言环境返回的字符串中是否还会有其他分隔符（例如，成千上万个分组）？

如果按照当前语言环境设置，应采用什么方法覆盖-始终将点/句点作为小数点并且没有分组？

And if its as per current locale, what is the way to override so that - its always Dot/Full-stop as decimal point and there are no grouping?

推荐答案

是的，流的默认语言环境是构造时的当前全局语言环境（请参见 basic_ios :: init 放入您喜欢的参考中，然后检查流的类型是否正常运行-标准类都不做。）

Yes, the default locale for a stream is the current global locale at the time of construction (see description of basic_ios::init in your favorite reference and then check that the kind of stream does not do otherwise -- none of the standard classes does).

更改语言环境，请使用 basic_ios :: imbue ，因此您可能要添加

To change the locale, use basic_ios::imbue, thus you probably want to add

strStream.imbue(std::locale::classic());

。

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