They are function parameters so the answer is B – formal.

Value parameters are used to pass information into a function. Reference parameters are used to pass information in and out of a function.

i.e. type function-name (formal parameter type list);

you are able to desire to apply the parameters argc and argv, exceeded to the main() function. i could provide you a greater particular answer, whether that’s been way too some years considering the fact that i’ve got written in c (i’ve got been out of programming as a occupation for 5 years). yet seek for important(), argc, and argv. in the MS worldwide (DOS, homestead windows command line), the command “attrib” permit you notice and set document permissions/attributes. in case you like some thing greater advantageous than “study-in basic terms, study/write, archive, hidden, equipment”, or once you’re in *nix, then i’m uncertain the place to bypass.