c++ - Should we include a macro(#define) in both .h & .cpp files -

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if use them in both files. going term "macro" in c++ it's replacement mechanism(doesn't know c++ structure) happens in pre-compilation stage.

is reason should define macro(#define) in both files or doesn't need or missing anything.?

defining macro in .h file , including .h file in .cpp file enough.


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