Using classes without header files?

Question

I know it can be done, but I'm confused as to why it helps. Is it mostly for organization? My computer broke so I'm using android to practice/learn c++.

Answer 1

Header files are just parts wich will be inserted in program
So it doesnt matter to include/use in the same file them

It is only for organizing your code

Answer 2

Thank you Michael. Sorry for the late response. Alone we go faster but together we go further.