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  Include:   <graph.h>
 
  Syntax:    short _arc( short x1, short y1, short x2, short y2,
                         short x3, short y3, short x4, short y4 );
 
             short _arc_wxy( struct _wxycoord _far *pwxy1,
                             struct _wxycoord _far *pwxy2,
                             struct _wxycoord _far *pwxy3,
                             struct _wxycoord _far *pwxy4 );
 
  Returns:   a nonzero value if the arc is drawn successfully, or
             0 if not.
 
  See also:  _ellipse, _getarcinfo, _lineto, _pie, _rectangle, _setcolor
                                    -♦-