C++ Demystified(c) A Self-Teaching Guide

What is the difference between variable scope and lifetime?

Must a function other than main be prototyped?

Is a function required to have at least one argument?

Can a function have more than one argument?

What is the effect on a variable in main if it is passed by value to another function which changes the argument corresponding to that variable?

What is the effect on a variable in main if it is passed by reference to another function which changes the argument corresponding to that variable?

Must a function have a return value?

Can a function have more than one return value?

May a function have neither a return value nor any arguments?

May a function have both a return value and arguments?