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std::system_error::what

STD：系统[医]错误：：什么

virtual const char* what() const;​(since C++11)

返回解释性字符串。

参数

%280%29

返回值

指向带解释性信息的以空结尾的字符串的指针。

例外

noexcept规格：

noexcept

另见

codereturns error code (public member function)

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