C Program to implement DDA Line Drawing Algorithm

#include<graphics.h>

#include<conio.h>

#include<math.h>

#include<dos.h>

void main()

 {

             int gd=DETECT,gmode,x1,y1,x2,y2,dx,dy,steps,k;

             float xincr,yincr,x,y;

             initgraph(&gd,&gmode,"c:\\turboc3\\bgi");

             printf("Enter the value of first co-ordinate values(x1,y1)value\n :");

             scanf("%d %d",&x1,&y1);

             printf("Enter the value of first co-ordinate values(x2,y2) value\n : ");

             scanf("%d %d",&x2,&y2);

             dx=x2-x1;

             dy=y2-y1;

             if(abs(dx)>abs(dy))

                  steps=abs(dx);

             else

                  steps=abs(dy);

             xincr=dx/steps;

             yincr=dy/steps;

             x=x1;

             y=y1;

             putpixel(floor(x+0.5),floor(y+0.5),7);

             for(k=1;k<steps;k++)

             {

                 x=x+xincr;

                 y=y+yincr;

                 putpixel(floor(x+0.5),floor(y+0.5),7);

                 delay(5);

             }

             getch();

 }

OUTPUT: