Bresenham's Circle Drawing Program (C++)

Bresenham's Circle Drawing C++ Program

#include<conio.h>

#include<Graphics.h>

#include<stdio.h>

void main() {

int gd = DETECT, gm;

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

int xc, yc, x, y, r, D;

printf ("Enter Radius of Circle: ");

scanf ("%d", &r);

printf ("Enter coordinates of centre of Circle: ");

scanf ("%d%d", &xc, &yc);

x=0;     y=r;

D=3-(2*r);            //Initial Decision parameter

while (x<=y) {

putpixel (y+xc, x+yc, 15 );            //……octet-1

putpixel (x+xc, y+yc, 15 );            //……octet-2

putpixel (-x+xc, y+yc, 15 );          //……octet-3

putpixel (-y+xc, x+yc, 15 );          //……octet-4

putpixel (-y+xc, -x+yc, 15 );        //……octet-5

putpixel (-x+xc, -y+yc, 15 );        //……octet-6

putpixel (x+xc, -y+yc, 15 );         //……octet-7

putpixel (y+xc, -x+yc, 15 );         //……octet-8

if (D<0) {

D=D+4*x+6;         //Next Decision Parameter

x++;

}

else {

D=D+4*(x-y)+10;         //Next Decision Parameter

x++;

y--;

}

}

getch ();

closegraph ();

}
  

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