Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
In this article
Four preprocessor-specific operators are used in the context of the #define
directive. See the following table for a summary of each. The stringizing, charizing, and token-pasting operators are discussed in the next three sections. For information on the defined
operator, see The #if, #elif, #else, and #endif directives.
Operator | Action |
---|---|
Stringizing operator (#) | Causes the corresponding actual argument to be enclosed in double quotation marks |
Charizing operator (#@) | Causes the corresponding argument to be enclosed in single quotation marks and to be treated as a character (Microsoft-specific) |
Token-pasting operator (##) | Allows tokens used as actual arguments to be concatenated to form other tokens |
defined operator | Simplifies the writing of compound expressions in certain macro directives |
Preprocessor directives
Predefined macros
c/c++ preprocessor reference