full scripts in support files?

[Sesshzakuto]

I am just starting to learn c++.. I am a little confused how header (.h) and extra (.cpp) files work.

I made a simple (and working) add two numbers together program.

However when I put the scripts in another (.cpp) file, then from main call the functions... it causes CIN to not declare what x and y are anymore. (I tried putting the code in header too without the other .cpp to try another option)

Can something like this not be done?

[Esslercuffi]

http://www.cplusplus.com/articles/Gw6AC542/

[Esslercuffi]

If you want more specific help, post your code and I'll look it over.