Question

Write a program To implement area filling (flood fill)

Answer 1

#include<stdio.h>
#include<graphics.h>
#include<conio.h>

void flood(int, int, int, int);
void main()
{int gd,gm;
 
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"\\tc\\bgi");

rectangle(50,50,100,100);
flood(55,55,4,15);
getch();
closegraph();
}

void flood(int seed_x,int seed_y,int foreground_col,int background_col)
{
if(getpixel(seed_x,seed_y)!= background_col &&
getpixel(seed_x,seed_y)!= foreground_col)
{
putpixel(seed_x,seed_y,foreground_col);
flood(seed_x+1,seed_y,foreground_col,background_col);
flood(seed_x-1,seed_y,foreground_col,background_col);
flood(seed_x,seed_y+1,foreground_col,background_col);
flood(seed_x,seed_y-1,foreground_col,background_col);

flood(seed_x+1,seed_y+1,foreground_col,background_col);
flood(seed_x-1,seed_y-1,foreground_col,background_col);
flood(seed_x+1,seed_y-1,foreground_col,background_col);
flood(seed_x-1,seed_y+1,foreground_col,background_col);
}
}