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

int main()
{
   
    int x=120,y=115,bcolor,fcolor;
    int xmin=100,ymin=100,xmax=150,ymax=120;
    void boundaryFill4(int x,int y, int fill,int boundary);
   
    int gdriver = DETECT, gmode;
    clrscr();
    
    clrscr();
    
    initgraph(&gdriver, &gmode, "c:\\tc\\bgi");
    setcolor(3);
    rectangle(xmin, ymin, xmax, ymax);
    boundaryFill4(x,y,4,3);
    getch();
    closegraph();
    return 0;
}


void boundaryFill4(int x,int y, int fill,int boundary)
{
    int current;
    current=getpixel(x,y);
    if((current != boundary) && (current != fill))
    {
        setcolor(fill);
        putpixel(x,y,fill);
        boundaryFill4(x+1,y,4,3);
        boundaryFill4(x-1,y,4,3);
        boundaryFill4(x,y+1,4,3);
        boundaryFill4(x,y-1,4,3);
    }

}