Should '#include' and 'using' statements be repeated in both header and implementation files (C++)?

Question

I\'m fairly new to C++, but my understanding is that a #include statement will essentially just dump the contents of the #included file into the location of that statement. This

Answer 1

Keep the header files to a minimum. This means as little include's as feasible. the .cpp file will usually include the corresponding header as well as any other headers necessary for implementation.