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# Program of Flood fill algorithm

Posted By: Easy Tutor     Category: C++ Programming     Views: 27108

## Code for Program of Flood fill algorithm in C++ Programming

```# include <stdio.h>
# include <dos.h>
# include <iostream.h>
# include <conio.h>
# include <stdlib.h>
# include <graphics.h>

void FloodFill(int,int,int,int);
void MidPoint(int);
void main()
{
int xCenter=320;
int yCenter=240;
int gDriver = DETECT, gMode, errorcode;
initgraph(&gDriver, &gMode, "c:\\tc\\bgi");
cleardevice();
MidPoint(49);

FloodFill(xCenter+1,yCenter+1,0,8);
getch();
return;
}

{
int iCntr, x, y,p0;
x=0;
int xCenter=320;
int yCenter=240;

putpixel(xCenter+x,yCenter+y,15);
putpixel(xCenter-x,yCenter+y,15);
putpixel(xCenter+x,yCenter-y,10);
putpixel(xCenter-x,yCenter-y,10);
putpixel(xCenter+y,yCenter+x,12);
putpixel(xCenter-y,yCenter+x,12);
putpixel(xCenter+y,yCenter-x,9);
putpixel(xCenter-y,yCenter-x,9);

while(x<=y)
{
if(p0 < 0)
{
p0=p0 + 2*(x+1) + 1;
x=x+1;
}
else
{
p0=p0 + 2*(x+1) + 1 - 2*(y-1);
x=x+1;
y=y-1;
}

putpixel(xCenter+x,yCenter+y,15);
putpixel(xCenter-x,yCenter+y,15);
putpixel(xCenter+x,yCenter-y,10);
putpixel(xCenter-x,yCenter-y,10);
putpixel(xCenter+y,yCenter+x,12);
putpixel(xCenter-y,yCenter+x,12);
putpixel(xCenter+y,yCenter-x,9);
putpixel(xCenter-y,yCenter-x,9);

}

}
void FloodFill(int pointx,int pointy,int OldColor,int NewColor)
{
int Intensity=getpixel(pointx,pointy);
if(Intensity==OldColor)
{
putpixel(pointx,pointy,NewColor);
FloodFill(pointx+1,pointy,OldColor,NewColor);
FloodFill(pointx-1,pointy,OldColor,NewColor);
FloodFill(pointx,pointy+1,OldColor,NewColor);
FloodFill(pointx,pointy-1,OldColor,NewColor);
}
}```
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