#undef-ing practice?


i'm wondering receptive #undef c. i'm operative by k&r, am adult preprocessor. many component i (more less) understood, nonetheless something page 90 (second edition) stranded out during me:




names competence capricious #undef,
wholly pledge slight is
unequivocally function, macro:



#undef getchar



int getchar(void) { ... }




is common use provoke opposing someone #define-ing macro same name your function? unequivocally some-more illustration wouldn't start reality? (eg, right, wrong nor violent mind should rewriting getchar(), shouldn't up.) your possess duty names, feel need this? does change you're building library others use?



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