Graphics Diagonal Line

 /*   .......tested on Win XP      */


#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main(void)
{
   int gd=DETECT,gm,x=50,y=30;
   clrscr();
   initgraph(&gd,&gm,"c:\\tc\\bgi"); /*Sometimes it may be  "C:\\TC\\BGI"  , It depends machine to mac..*/
   for(y=90;y<400;y++)
    {
      putpixel(x,y,RED);
      x++;
    }
   getch();
   closegraph();
  }