Breshanham line drawing program

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


void main()
{
int Xs,Ys,Xe,Ye,dx,dy;
float X,Y,p;
int gd=DETECT,gm ;
initgraph(&amp;gd,&amp;gm,"C:\\tc\\bgi");
printf ("Enter the value of (Xs , Xs ) &amp; (Xe , Ye)\n");
scanf ("%d%d%d%d", &amp;Xs ,&amp;Ys , &amp;Xe , &amp;Ye);
dy=Ye-Ys;
dx=Xe-Xs;
p=(2*dy)-dx;
X=Xs;
Y=Ys;
cleardevice( );
putpixel(X,Y,YELLOW);
while(X!=Xe &amp;&amp; Y!=Ye)
{
if(p&lt;1)
{
X=X+1;
p=p+(2*dy);
putpixel (X,Y,RED);
}
else
{
X=X+1;
Y=Y+1;
p=p+(2*dy)-(2*dx);
putpixel(X,Y,GREEN);
}
}
getch ( );
closegraph ( );
}

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<math.h>

void main()

{

int Xs,Ys,Xe,Ye,dx,dy;

float X,Y,p;

int gd=DETECT,gm ;

initgraph(&gd,&gm,"C:\\tc\\bgi");

printf ("Enter the value of (Xs , Xs ) & (Xe , Ye)\n");

scanf ("%d%d%d%d", &Xs ,&Ys , &Xe , &Ye);

dy=Ye-Ys;

dx=Xe-Xs;

p=(2*dy)-dx;

X=Xs;

Y=Ys;

cleardevice( );

putpixel(X,Y,YELLOW);

while(X!=Xe && Y!=Ye)

{

if(p<1)

{

X=X+1;

p=p+(2*dy);

putpixel (X,Y,RED);

}

else

{

X=X+1;

Y=Y+1;

p=p+(2*dy)-(2*dx);

putpixel(X,Y,GREEN);

}

getch ( );

closegraph ( );

}

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