BRESENHEM

#include<graphics.h>
#include<conio.h>
#include<stdio.h>
void main()
{
int gd=DETECT, gm, i;
float x,y,dx,dy,steps;
int x0, x1, y0, y1;
initgraph(&gd, &gm, “C:\\TC\\BGI”);
setbkcolor(WHITE);
x0=100, y0=200, x1=500,y1=300;
dx=(float)(x1-x0);
dy=(float)(y1-y0);
if(dx>=dy)
{
steps=dx;
}
else{
steps=dy;
}
dx=dx/steps;
dy=dy/steps;
x=x0;
y=y0;
i=1;
while(i<=steps)
{
putpixel(x,y,RED);
x+=dx;
y+=dy;
i=i+1;
}
getch();
closegraph();
}