   .
                .
                .
         <b>removi_c</b> ( 999, &amp;planets   );
         <a href="insrti_c.html">insrti_c</a> ( 999, &amp;asteroids ); 


      If 999 is not an element of planets, then the contents of planets
      are not changed. Similarly, if 999 is already an element of
      asteroids, the contents of asteroids remain unchanged.
 </PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4