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What is a preprocessor directive

  • A.a message from compiler to the programmer
  • B.a message from programmer to the microprocessor
  • C.a message from programmer to the preprocessor
  • D.a message from compiler to the linker

Answer: C

Correct answer: a message from programmer to the preprocessor

A directive such as #include, #define or #ifdef is an instruction to the preprocessor, the phase that transforms the source text before the compiler sees it. It is not part of the C language proper, which is why directives have their own syntax and end at the end of a line rather than at a semicolon.

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