setaspectratio()        Set the Aspect Ratio

 #include   <graphics.h>

 void far setaspectratio(xasp, yasp);
 int xasp;      X aspect
 int yasp;      Y aspect

        This function sets the aspect ratio. The value of yasp should
        be 10,000; xasp should be the same for square pixels as in the
        VGA and less than that value for tall pixels (as on other
        monitors).

    Returns:     Nothing.

   -------------------------------- Example ---------------------------------

    The following statements draws a circle with aspect ratio 2:1.

           #include <graphics.h>

           int gdriver = DETECT;
           int gmode;
           int x;

           main()
           {
               initgraph(&gdriver,&gmode,"");
               cleardevice();
               setaspectratio(20000, 10000);
               circle(300,150,100);
               getch();
               closegraph();
           }