Best practice for including from include files

Question

I was wondering if there is some pro and contra having include statements directly in the include files as opposed to have them in the source file.

Personally I like to

Answer 1

There's not really any standard best-practice, but for most accounts, you should include what you really need in the header, and forward-declare what you can.

If an implementation file needs something not required by the header explicitly, then that implementation file should include it itself.