Unicode: The Wide-Character Set

A wide character is a 2-byte multilingual character code. Any character in use in modern computing worldwide, including technical symbols and special publishing characters, can be represented according to the Unicode specification as a wide character. Developed and maintained by a large consortium that includes Microsoft, the Unicode standard is now widely accepted.

A wide character is of type wchar_t. A wide-character string is represented as a wchar_t[] array. You point to the array with a wchar_t* pointer.

You can represent any ASCII character as a wide character by prefixing the letter L. For example, L'\0' is the terminating wide (16-bit) null character.

You can represent any ASCII string literal as a wide-character string literal by prefixing the letter L. For example, L"Hello".

Generally, wide characters use more space in memory than multibyte characters. But wide characters are faster to process. Only one locale can be represented at a time in multibyte encoding. All character sets in the world are represented simultaneously by the Unicode representation.

See also

Internationalization
Universal C runtime routines by category