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Chapter 10. The C Preprocessor

When & how to use them

10.1. What is the C Prepressor

The C Preprocessor is a simple macro-expander that is run on source code files before passing them to the compiler. Lines that begin with the hash symbol '#' are directives to the C preprocessor.

When you create a macro you assign a name to a C expression. You can then use this name in your code just as you would have used the expression. The preprocessor replaces all occurences of that name with the expression.

 
 
  Published under the terms of the GNU General Public License Design by Interspire