How Does C Handle Unicode in Source Code, Identifiers, and Strings?

Unicode in C Source Code

Question:

The standard encoding for C source code is not explicitly defined. However, implementations must support characters from the basic source character set and provide a mechanism to represent other characters using universal character names.

In terms of Unicode, implementations are allowed to use any internal encoding as long as extended characters expressed in the source file are handled equivalently to those expressed using universal character names.

Unicode in Identifiers:

Unicode characters can be used in identifiers as well, subject to the rules defined in Annex E.

Unicode in Strings:

C provides wchar_t for representing Unicode characters in strings. Wide character strings can be used to store non-ASCII characters, including Chinese characters. The example provided in the original question is valid and represents a string containing non-ASCII characters.

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