Preprocessor

A program invoked by various compilers to process code before compilation.

For example, the C preprocessor, cpp, handles textual macro substitution, conditional compilation and inclusion of other files.

A preprocessor may be used to transform a program into a simpler language, e.g. to transform C++ into C.

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pre-order pre-order traversal PREP prepaging prepend	Ada++ Alfl \begin C cfortran.h	pre-sales support rep presence detect presentation layer Presentation Manager prestidigitization