Write C++ program to draw circle using Br4esenham's algorithm. Inherit pixel class.

#include<graphics.h>

#include<iostream>

using namespace std;

class pixel

{

      

  public:

          float x1,y1,r;

          void brecircle(float x1,float y1,float r);

    

};

class point : public pixel

{

          pixel p;

  public:

          void Drawcircle()

          {

                cout<<"Enter the starting co-ordinates of a center:";

             cin>>p.x1>>p.y1;

             cout<<"Enter the value of radius:";

             cin>>p.r; 

                brecircle(p.x1,p.y1,p.r);

          }

};

void pixel::brecircle(float x1,float y1,float r)

{

       

          float x,y,p;

       x=0;

       y=r;

       p=3-(2*r);

       while(x<=y)

       {

           putpixel(x1+x,y1+y,WHITE);

           putpixel(x1-x,y1+y,WHITE);

           putpixel(x1+x,y1-y,WHITE);

           putpixel(x1-x,y1-y,WHITE);

           putpixel(x1+y,y1+x,WHITE);

           putpixel(x1+y,y1-x,WHITE);

           putpixel(x1-y,y1+x,WHITE);

           putpixel(x1-y,y1-x,WHITE);

           x=x+1;

           if(p<0)

           {

                p=p+4*(x)+6;

           }

           else

           {

                p=p+4*(x-y)+10;

                y=y-1;

           }

           delay(20);

      }

}

int main()

{

         int gd=DETECT,gm;

         initgraph(&gd,&gm,NULL);

    

         point pt;

         pt.Drawcircle();

   

         delay(50000);

         closegraph();

         return 0;

}

/*OUTPUT:

ssl@ssl-OptiPlex-3010:~$ cd Downloads

ssl@ssl-OptiPlex-3010:~/Downloads$ ./A2_Final

Enter the starting co-ordinates of a center:

100

150

Enter the value of radius:60

ssl@ssl-OptiPlex-3010:~/Downloads$ */