how to declare a define external to another module - Embedded C/C++

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how to declare a define external to another module Posted by witchhazel on 29 Sept 2009 at 4:41 PM

If you have a define in one file/module and want to use the same define in another file/module without duplicating the define, how do you indicate it is an external define?

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Re: how to declare a define external to another module Posted by rasmiranjanbab on 3 Nov 2009 at 3:57 AM

In one file write
e.g

extern int i;
and in another file just write int i.

after seeing extern keyword by compiler, compiler will come to know that this variable is used or declared somewhere else in this module.

I hope this helps..

Regards,
R. R. Nayak

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