C++ Language Program for line drawing using Bresenham's Line Algorithm.

A C++ language program for line drawing using Bresenham's Line Algorithm.

#include<iostream.h>

#include <conio.h>

#include<graphics.h>

void main()

{

int d=DETECT,g;

initgraph(&d,&g,"c://tc//bgi");

clrscr();

int x,y,x1,y1,x2,y2,dx,dy,c1,c2,p,color=1;

cout<<"enter points x1,y1,x2,y2";

cin>>x1>>y1>>x2>>y2;

clrscr();

dx=x2-x1;

dy=y2-y1;

p=2*dy-dx;

c1=2*dy;

c2=2*(dy-dx);

x=x1,y=y1;

putpixel(x,y,color);

while(x<x2)

{ x++;

if(p<0)

       {

p=p+c1;

       }

else

       {

p=p+c2;

y++;

       }

putpixel(x,y,color);

}

getch();

closegraph();

getch();

}