Write a programme of Boundary Fill Algorithm in C.

 Boundary Fill Algorithm

#include<stdio.h>

#include<graphics.h>

#include<dos.h>

#include<conio.h>

void boundaryfill(int x,int y,int f_color,int b_color)

{

    if(getpixel(x,y)!=b_color && getpixel(x,y)!=f_color)

    {

        putpixel(x,y,f_color);

        boundaryfill(x+1,y,f_color,b_color);

        boundaryfill(x,y+1,f_color,b_color);

        boundaryfill(x-1,y,f_color,b_color);

        boundaryfill(x,y-1,f_color,b_color);

    }

}

//getpixel(x,y) gives the color of specified pixel

int main()

{

    int gm,gd=DETECT,radius;

    int x,y;

    printf("Enter x and y positions for circle\n");

    scanf("%d%d",&x,&y);

    printf("Enter radius of circle\n");

    scanf("%d",&radius);

    initgraph(&gd,&gm,"c:\\turboc3\\bgi");

    circle(x,y,radius);

    boundaryfill(x,y,4,15);

    delay(5000);

    closegraph();

    getch();

    return 0;

}

output-