Defining Objects of this Class
Notice how similar defining objects of class is
to defining variables of any data type:
string   my_str;   vs.     int i;
Defining an object causes the “constructor” to
be invoked; a constructor is the same named
function as the class (string) and is used to
initialize the memory set aside for this object
Think about how much memory is set aside?
What initial values should it take on?