// File name: bookcirc.h
// Author: textbook author
// Modified : X. Meng 
//      1) removed two members: area and perimeter
//      2) changed comput_area and compute_perimeter as private member
// Circle class definition

class circle
{
   public:              
      // enumeration type
      enum color {black, blue, green, cyan, red,
                    magenta, brown, lightgray, nocolor};

      // Member Functions...
      // CONSTRUCTOR
      circle ();

      // SET CENTER POSITION
      void set_coord (int, int);

      // SET_RADIUS
      void set_radius (int);

      // SET COLOR
      void set_color (color);

      // DISPLAY ATTRIBUTES
      void display_circle () const;

      // ACCESSOR FUNCTIONS
      int get_x_coord () const;
      int get_y_coord () const;
      int get_radius () const;
      color get_color () const;
      float get_area () const;
      float get_perimeter () const;


   private:
      // Member Functions...
      // COMPUTE THE AREA
      float compute_area () const;

      // COMPUTE THE PERIMETER
      float compute_perimeter () const;

      // Data members (attributes) ...
      int x_coord;
      int y_coord;
      int radius;
      color c_color;
};