In C++ do you have to declare all variables and methods in another class?

Answer 1

Normally you declare your variables and method where you need them... You're probably meaning templates or header files?

Answer 2

Yes, I mean the header

Answer 3

Sorry for late answer, was not in the mood for long explanations (and this was required here). But I found a link where some people already did it for you (read all answers) 🙃

https://softwareengineering.stackexchange.com/questions/297939/c-header-files-design-just-like-defining-an-api/297955#297955