Write a programme of Breshnem Circle Algorithm in C?

Breshnem Circle Algoritham in C

#include<graphics.h>

#include<stdio.h>

void pixel(int xc,int yc,int x,int y);

int main()

{

            int gd,gm,xc,yc,r,x,y,p;

            detectgraph(&gd,&gm);

            initgraph(&gd,&gm,"C://TurboC3//BGI");

           

            printf("Enter center of circle :");

            scanf("%d%d",&xc,&yc);

            printf("Enter radius of circle :");

            scanf("%d",&r);

           

            x=0;

            y=r;

            p=3-2*r;

            pixel(xc,yc,x,y);

           

            while(x<y)

            {

                        if(p<0)

                        {

                                    x++;

                                    p=p+4*x+6;

                        }

                        else

                        {

                                    x++;

                                    y--;

                                    p=p+4*(x-y)+10;

                        }

                        pixel(xc,yc,x,y);

            }

           

            getch();

            closegraph();

            return 0;

}

 

void pixel(int xc,int yc,int x,int y)

{

            putpixel(xc+x,yc+y,WHITE);

            putpixel(xc+x,yc-y,WHITE);

            putpixel(xc-x,yc+y,WHITE);

            putpixel(xc-x,yc-y,WHITE);

            putpixel(xc+y,yc+x,WHITE);

            putpixel(xc+y,yc-x,WHITE);

            putpixel(xc-y,yc+x,WHITE);

            putpixel(xc-y,yc-x,WHITE);

}

Output :