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C : Preprocessor Directives

Tutorial by:      Date: 2016-04-27 05:24:45

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The C preprocessor is a micro processor that is used by compiler to transform your code before compilation. It is called micro preprocessor because it allows us to add macros.

Note: Proprocessor direcives are executed before compilation.

C preprocessor

All preprocessor directives starts with hash # symbol.

Let's see a list of preprocessor directives.

  • #include
  • #define
  • #undef
  • #ifdef
  • #ifndef
  • #if
  • #else
  • #elif
  • #endif
  • #error
  • #pragma

What is Macro

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C

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