The preprocessor in C/C++ runs before compilation, executing directives marked by # symbol, such as #define, #include, and others, enhancing code readability and functionality.
Preprocessor directives like #if, #elif, #else, and #endif allow conditional testing, while #error and #warning aid in generating errors or continuing compilation with messages.
Developers write C programs, preprocessor checks for directives, executing actions before compilation, followed by compiler generating object code and execution by linker.
If no preprocessor directives exist, code goes directly to the compiler for object code generation and execution by the linker.
Collection
[
|
...
]