Insert an item into an integer set. 

   SETS 

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   item       I   Item to be inserted. 
   set       I/O  Insertion set. 

   item        is an item which is to be inserted into the 
               specified set. item may or may not already 
               be an element of the set. 


   set         is a CSPICE set.  set must be declared as an integer
               SpiceCell. 

               On input, set  may or may not contain the input item 
               as an element. 

   set         on output contains the union of the input set and 
               the singleton set containing the input item.

   None. 

   None. 

   1) In the following example, the NAIF ID code of Pluto is removed from 
      the integer set planets and inserted into the integer set 
      asteroids. 

         #include "SpiceUsr.h"
                .
                .
                .
         /.
         Declare the sets with maximum number of elements MAXSIZ.
         ./
         SPICEINT_CELL ( planets,   MAXSIZ );
         SPICEINT_CELL ( asteroids, MAXSIZ );
                .
                .
                .
         removi_c ( 999, &planets   );
         insrti_c ( 999, &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. 

   None. 

   1) If the input set argument is a SpiceCell of type other than
      integer, the error SPICE(TYPEMISMATCH) is signaled.

   2) If the insertion of the element into the set causes an excess 
      of elements, the error SPICE(SETEXCESS) is signaled. 

   3) If the input set argument does not qualify as a CSPICE set, 
      the error SPICE(NOTASET) will be signaled.  CSPICE sets have
      their data elements sorted in increasing order and contain
      no duplicate data elements.

   None. 

   N.J. Bachman    (JPL) 
   C.A. Curzon     (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 

   None. 

   -CSPICE Version 2.0.0, 01-NOV-2005 (NJB)

       Long error message was updated to include size of
       set into which insertion was attempted.

   -CSPICE Version 1.0.0, 07-AUG-2002 (NJB) (CAC) (WLT) (IMU)

   insert an item into an integer set