#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>
void fill_right(int x,int y);
void fill_left(int x,int y);
void main()
{
int
gd=DETECT,gm,x,y,n,i;
clrscr();
initgraph(&gd,&gm,"c:\\turboc=\\bgi");
printf("*** Boundary Fill algorithm ***");
/*- draw object -*/
line (50,50,200,50);
line (200,50,200,300);
line (200,300,50,300);
line (50,300,50,50);
/*- set seed point -*/
x=100;
y=100;
fill_right(x,y);
fill_left(x-1,y);
getch();
}
void fill_right(int x,int y)
{
if((getpixel(x,y) != WHITE)&&(getpixel(x,y)
!= RED))
{
putpixel(x,y,RED);
fill_right(++x,y);
x=x-1;
fill_right(x,y-1);
fill_right(x,y+1);
}
delay(1);
}
void fill_left(int x,int y)
{
if((getpixel(x,y) != WHITE)&&(getpixel(x,y)
!= RED))
{
putpixel(x,y,RED);
fill_left(--x,y);
x=x+1;
fill_left(x,y-1);
fill_left(x,y+1);
}
delay(1);
}
Output
