c++ - 在 C++ 代码中使用 "umlauts"

Question

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Answer 1

GCC 对此提示: codepad

: error: stray '\303' in program

C++ 语言标准本身将 基本源字符集 限制为 91 个可打印字符加上制表符、换页符和换行符，这些都在 ASCII 中。但是，有一个很好的脚注:

The glyphs for the members of the basic source character set are intended to identify characters from the subset of ISO/IEC 10646 which corresponds to the ASCII character set. However, because the mapping from source file characters to the source character set (described in translation phase 1) is specified as implementation-defined, an implementation is required to document how the basic source characters are represented in source files.

.. 翻译阶段 1 是(强调我的)

Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set (introducing new-line characters for end-of-line indicators) if necessary. The set of physical source file characters accepted is implementation-defined.

通常，您不应在代码中使用变音符号或其他特殊字符。如果可能有效，但如果有效，则它是特定于编译器的功能。