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Description:
  new
Language: C/C++
Code:
#include<graphics.h>
#include<math.h>
#include<iostream.h>
#include<conio.h>
#include<dos.h>
void main()
{
     float x,y,x1,y1,x2,y2,dx,dy,e;
     int i,gd=DETECT,gm;
     clrscr();
     /* Read two end points of line */
     cout<<"Enter the value of x1 :t";
     cin>>x1;
     cout<<"Enter the value of y1 :t";
     cin>>y1;
     cout<<"Enter the value of x2 :t";
     cin>>x2;
     cout<<"Enter the value of y2 :t";
     cin>>y2;
     /* Initialise graphics mode*/
     initgraph(&gd,&gm,"c:/tc/bgi");

     dx=abs(x2-x1);
     dy=abs(y2-y1);
     /* Initialise starting point
      * -----------------------------*/
     x = x1;
     y = y1;
     /* Initialise decision variable
      * -------------------------------- */
     e=2*dy-dx;
     i=1;    /* Initialise loop counter */
     do
     {
          putpixel(x,y,WHITE);
          delay(60);
          while(e >= 0)
          {
               y=y+1;
               e=e-2*dx;
          }
          x=x+1;
          e=e+2*dy;
          i=i+1;
     }
     while(i <= dx);
     getch();
     closegraph();
}     
          
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