can function/method declared/defined in a file invoking another by ‘#include’ be seen/used by the file it includes?

[marhuum]

How can a function/method declared and defined in a file invoking another by ‘#include’ be seen/used by the file it includes since the included file precedes it in compiling on C++?

[MikeyBoy]

Can you show us the code you're talking about?

[marhuum]

Nevermind, this answer https://www.quora.com/How-can-a-function-method-declared-and-defined-in-a-file-invoking-another-by-include-be-seen-used-by-the-file-it-includes-which-precedes-it-in-compiling-on-C has inspired me to solve it... Thanks