next dumb question re header files

my project is split over several files so i need to declare the function bool toggle_turn(void) in a header file so main can find it. when i try to compile to test everything so far i get an error saying bool is undefined.

a) do i need to include the stdbool.h file in my own header file
b) if so do i need to declare it in main and the other source files as well.

many thanks
coop

You should #include <stdbool.h> wherever you use bool, so yes for both. In theory you can avoid including it in the file containing the main function since it would be included via your own header, but that makes for fragile code if you do mention bool in that source file.

thanks for the reply.