Definition Despite frequent terminology confusion FILE is not a macro.…

Introduction The __LINE__ macro is a standard predefined identifier that…

Introduction Predefined macros are identifiers automatically injected by the C…

Introduction The #error directive is a compile-time enforcement mechanism in…

Introduction The #pragma directive provides a mechanism for programmers to…

Definition The #include directive is a preprocessor command that instructs…

Definition The #ifdef directive is a preprocessor command that enables…

Introduction The #ifndef directive is a fundamental preprocessor conditional that…

Introduction The #else directive is a core component of C's…

Introduction The #elif directive is a preprocessor construct that enables…