How Can I Use Unicode Characters in C Source Code?

Unicode Support in C Source Code

In C , the standard encoding of source code is implementation-defined. However, the C standard mandates the use of the basic source character set, which includes common ASCII and internationalization characters. Additionally, it allows for the specification of non-ASCII characters using universal character names (e.g., uffff).

Non-ASCII Characters in Comments and Strings

You can include non-ASCII characters in comments using universal character names, such as Chinese characters. Full Unicode is not allowed in source code comments or strings.

Unicode for Strings

Unicode characters can also be used in strings through the wstring data type, which explicitly represents Unicode characters. This allows you to store and manipulate non-ASCII strings, such as:

<code class="cpp">wstring str = L"Strange chars: â Țđ ě €€";</code>

Encoding Considerations

The mapping from physical source file characters to the source character set is implementation-defined. This means that different compilers may use different encodings. You can specify the encoding used by your compiler with the -finput-charset=charset option (for file encoding) and -fexec-charset=charset (for character representation at runtime).

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