Drawing aline using bresenham algorithm

Printing a line using bresenham algorithm

#include<stdio.h>                                                   

#include<conio.h>

#include<graphics.h>                                                    

void main()

{

            int x,y,x1,y1,x2,y2,dx,dy,xi,yi,s,p,i;                                                                                                                                                    

            int gdriver=DETECT,gmode,gerror;                                                                                               

            initgraph(&gdriver,&gmode,"c:\\tc\\bgi");                                

            printf("\nEnter First Point (x1,y1):");

            scanf("%d%d",&x1,&y1);                                                  

            printf("\nEnter Second Point (x2,y2):");

            scanf("%d%d",&x2,&y2);                                                   

            x=x1;

            y=y1;

            putpixel(x,y,2);                    

            dx=x2-x1;

            dy=y2-y1;

            p=(2*dy-dx);                        

            while(x<=x2)

            {

                        if(p<0)

                        {

                                    x=x+1;

                                    p=p+2*dy;                                                         

                        }       

                        else

                        {

                                    x=x+1;

                                    y=y+1;

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

                        }

                        putpixel(x,y,7);        

            }

            getch();

            closegraph();

}

output