Here is the Bresenham's Circle Drawing Algorithm program in c. This is Computer Graphics algorithm, Used to draw a circle.

To draw a circle using the Bresenham algorithm, C compiler uses Graphics.h header file. Here we will use Turbo C compiler to compile the program.

Before you copy and start execution of the program, I would suggest completing the instructions mentioned in the article.

Also Read: Bresenham line drawing algorithm program in c

Also Read: Bresenham line drawing algorithm program in c

# include<stdio.h>

# include<conio.h>

# include<graphics.h>

# include<math.h>

void main()

{

int gd=DETECT,gm;

int r,x,y,p,xc=320,yc=240;

initgraph(&gd,&gm,"C:\\TC\\BGI");

cleardevice();

printf("Enter the radius ");

scanf("%d",&r);

x=0;

y=r;

putpixel(xc+x,yc-y,1);

p=3-(2*r);

for(x=0;x<=y;x++)

{

if (p<0)

{

y=y;

p=(p+(4*x)+6);

}

else

{

y=y-1;

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

}

putpixel(xc+x,yc-y,1);

putpixel(xc-x,yc-y,2);

putpixel(xc+x,yc+y,3);

putpixel(xc-x,yc+y,4);

putpixel(xc+y,yc-x,5);

putpixel(xc-y,yc-x,6);

putpixel(xc+y,yc+x,7);

putpixel(xc-y,yc+x,8);

}

getch();

closegraph();

}

# include<conio.h>

# include<graphics.h>

# include<math.h>

void main()

{

int gd=DETECT,gm;

int r,x,y,p,xc=320,yc=240;

initgraph(&gd,&gm,"C:\\TC\\BGI");

cleardevice();

printf("Enter the radius ");

scanf("%d",&r);

x=0;

y=r;

putpixel(xc+x,yc-y,1);

p=3-(2*r);

for(x=0;x<=y;x++)

{

if (p<0)

{

y=y;

p=(p+(4*x)+6);

}

else

{

y=y-1;

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

}

putpixel(xc+x,yc-y,1);

putpixel(xc-x,yc-y,2);

putpixel(xc+x,yc+y,3);

putpixel(xc-x,yc+y,4);

putpixel(xc+y,yc-x,5);

putpixel(xc-y,yc-x,6);

putpixel(xc+y,yc+x,7);

putpixel(xc-y,yc+x,8);

}

getch();

closegraph();

}

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