wouter van ooijen <wouter@voti.nl> wrote:
> > Where and how do we define those variables?
> > My understanding is that they should be declared in main.h so 
> 
> The magic is in the separation of defining and declaring (iirc the
> correct words):
> 
> in the .h: external int foo;
> 
> in one of the .c: int foo;
> 
> It is the same trick you use (probably without knowning) for functions:
> 
> .h:   foo();
> .c:   foo(){...}

For a further refinement along these lines, see Problem #1 here:

   http://www.circuitcellar.com/library/eq/160/index.htm

-- Dave Tweed
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