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 linerel()               Draw Line a Relative Dist From Current Position

 #include   <graphics.h>

 void far   linerel(x1,y1);
 int        x1;
 int        y1;

    linerel() draws a line from the current position (CP) to a point that
    is a relative distance ('x1','y1') from the current position.  The
    line is drawn 'x1' pixels in the x direction and 'y1' pixels in the y
    directions. The line is drawn in the current color, line style and
    thickness.  The (CP) is moved to the new position.


    Returns:    Nothing.

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

    The following statements draw rays out to points relative to the
    original current position.

           #include <graphics.h>
           #include <conio.h>

           int gdriver = DETECT;
           int gmode;

           main()
           {
               int x0, y0;

               initgraph(&gdriver,&gmode,"");
               x0 = getx();
               y0 = gety();
               linerel(100,200);
               moveto(x0,y0);
               linerel(200,200);
               moveto(x0,y0);
               linerel(300,200);
               moveto(x0,y0);
               linerel(400,200);
               getch();
               closegraph();
           }