Write a program to fill a circle using boundary fill algorithm

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void boundryFill(int, int, int, int);

int midx=319, midy=239;

void main()

{

  int gdriver=DETECT, gmode, x,y,r;

  initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

  cleardevice();

  printf("Enter the Center of circle (X,Y) : ");

  scanf("%d %d",&x,&y);

  printf("Enter the Radius of circle R : ");

  scanf("%d",&r);

  circle(midx+x,midy-y,r);

  getch();

  boundryFill(midx+x,midy-y,13,15);

  getch();

  closegraph();

}

void boundryFill(int x, int y, int fill, int boundry)

{

  if( (getpixel(x,y) != fill) && (getpixel(x,y) != boundry) )

  {

      putpixel(x,y,fill);

      delay(5);

      boundryFill(x+1,y,fill,boundry);

      boundryFill(x-1,y,fill,boundry);

      boundryFill(x,y+1,fill,boundry);

      boundryFill(x,y-1,fill,boundry);

  }

}