In my experience, few hobbyists or experimenters take advantage of C preprocessor operations. You've probably seen preprocessor directives such as #include <stdio.h> or #include "servo.h"among the first lines in programs. However, they are not part of the C language. When you compile a program, it first goes through a preprocessor that handles housekeeping tasks such as including files that operate a peripheral or that provide a function such as printf. This tutorial will show you how to take advantage of this.
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