Split a C++ class declaration

Question

I want to know if I can split a C++ class declaration

Original class

    class P
    {
        private: 
           int id;
           //some really          


        

Answer 1

If your purpose is to simply reduce clutter in your header, you can include a file in the middle of your class:

class P
{
#include "P.private_parts"

   protected:
       int x;
   public:
       P();
       int getX();
};