functions between cpp's

[Lee]

I'm trying to use the drawequipicons() function that is in the renderhud.cpp in the dokill() function that is inside of the clientgame.cpp

I read that to use functions defined in another cpp, I need to prototype them in a header (.h) file and then #include it in my clientgame.cpp.

I'm not quite sure if drawequipicons() is prototyped in a header or not, how do I find that out?