Compiler Directives

• Macro definition
  • #define <symbol_name> <substitution_string>

• Include directives
  • #include <filename>
  • #include "filename "

• Conditional compilation
  • #ifdef <identifier>
  • if-part: if, ifdef, ifndef
  • else-part: else
  • elseif-part: elif
  • endif-part: endif
  • #<if-part>
  • <statements>
  • [ # <elseif-part>
  • <statements> ]
  • [ #<else-part>
  • <statements> ]
  • #<endif-part>