CS 340 - 1/22/13

Writing code inside of the class definition
  causes  that method to be considered as inline.


class Point
{
....

  inline int x();
}

inline int Point::x()
{
  return x_;
}


In C++, every class has a default constructor
and a default destructor.

Constructor is a section of code executed when an 
instance of a class come into scope.

Destructor is a section of code executed when an
instance of a class goes out of scope.

Scope:  section of code in which an identifier
    can be used

Types of memory (from the Point of View of a program)
   - dynamic (heap)
   - automatic (program stack)
   - static - allocated at load time
              deallocated at termination time


Constructor: default constructor takes Zero parameters

class Point
{
  ....

  Point ();   // default constructor
  Point (int , int);

  ~Point ();  // destructor

};


Point::Point()
{
  x_ = 0;
  y_ = 0;
}

Point::Point(int a, int b)
{
  x_ = a;
  y_ = b;
}

Point::~Point()
{
   cout << "Destructor for the point instance ("
        << x_ << "," << y_ << ") was called."
        << endl;
}