data classes and abstraction

[neo001]

i have doubts regarding the use of classes.please explain to me with an example.

[Magos]

class POSITION
{
   public:
      POSITION();
      POSITION(int X, int Y);
      int GetX();
      int GetY();
      void SetX(int X);
      void SetY(int Y);
      void SetPosition(int X, int Y);
   private:
      int Xpos;
      int Ypos;
};

int main()
{
   POSITION PlayerPosition(120, 450);
   POSITION EnemyPosition(200, 180);
   ...
   return 0;
}