$func? ">=" (e.Exp1)(e.Exp2) = ;
$func? ">"  (e.Exp1)(e.Exp2) = ;
$func? "<=" (e.Exp1)(e.Exp2) = ;
$func? "<"  (e.Exp1)(e.Exp2) = ;
$func? "/=" (e.Exp1)(e.Exp2) = ;
$func? "="  (e.Exp1)(e.Exp2) = ;

$func Compare (e.Exp1)(e.Exp2)  = s.Res;   * '<', '>', '='