Notes 9 29 2014

Default Passing Mechanism:

Pass-By-Value or Pass-By-Copy

Alternative Passing Mechanism

Pass-By-Reference or Pass-By-Address 

****This allows the function to modify a parameter

1. Does the function modify the parameter?
2. Does the calling need to know about the change?

The Address-Of Operator (&)
int x;
cout << &x;

Candy vendingMachine( int &money );

It's safe to assume that a pass-by-reference parameter is an 
output parameter

Scope and Lifetime

Scope is where a variable is visible in the code

Global Variables are VERY bad
A Global Variable is one that is declare outside of a scope