Please express about those

Functions Function declarations (prototypes) vs definitions (bodies) -- why is a declaration needed? Multi-file projects and the purpose of .h files Know the standard preferred way of organizing functions into multiple files o h file contains function prototypes/declarations only o.cpp file contains implementation of functions Memory concerns "Automatic storage" and how it relates to variable scope for temporary variables (locals, parameters) ALL types are copied by value (duplicated) -- whether fundamental or object types