// File name: bookcirc.cpp
// 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 implementation

#include <iostream.h>
#include "bookcirc.h"

const float pi = 3.14159;

// Member Functions...
// CONSTRUCTOR
circle::circle ()
{
   x_coord = 0;
   y_coord = 0;
   radius = 0;
   c_color = nocolor;
}

// SET CENTER POSITION
void circle::set_coord (int x, int y)
{
   x_coord = x;
   y_coord = y;
}


// SET_RADIUS
void circle::set_radius (int r)
{
   radius = r;
}


// SET COLOR
void circle::set_color (color c)
{
   c_color = c;
}


// COMPUTE THE AREA
float circle::compute_area () const
{
   return (pi * radius * radius);
}


// COMPUTE THE PERIMETER
float circle::compute_perimeter () const
{
   return (2 * pi * radius);
}


// DISPLAY ATTRIBUTES
void circle::display_circle () const
{
   cout << "x-coordinate is " << x_coord << endl;
   cout << "y-coordinate is " << y_coord << endl;
   cout << "radius is " << radius << endl;
   cout << "color is " << int (c_color) << endl;
   cout << "area is " << compute_area() << endl;
   cout << "perimeter is " << compute_perimeter() << endl;
}


// ACCESSOR FUNCTIONS
int circle::get_x_coord() const
{
   return x_coord;
}

int circle::get_y_coord() const
{
   return y_coord;
}

int circle::get_radius() const
{
   return radius;
}

circle::color circle::get_color () const
{
   return c_color;
}

float circle::get_area() const
{
   return compute_area();
}

float circle::get_perimeter() const
{
   return compute_perimeter();
}