Given an item such as the Toolkit or an entry point name, return 
   the latest version string. 

   None. 

   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   item       I   Item for which a version string is desired. 

   The function returns a pointer to a version string. 

   item       is the item for which a version string is to be 
              returned. item may be "TOOLKIT", entry point names, 
              or program names. item is case insensitive. 

              Currently, the only item supported is "toolkit" 
              and it will return the toolkit version number. 

              Any other item will return "No version found." 

   The function returns a pointer to the latest version string for the 
   specified item. 

   If item is not one of the items haveing a version, a pointer to the 
   string "No version found." will return. 

   None. 

   None. 

   Suppose you want to find out the recent Toolkit configuration 
   version number. Using the code fragment below: 

      ConstSpiceChar  * versn;

      versn = tkvrsn_c ( "TOOLKIT" ); 

   The pointer versn would refer to a string similar to the one 
   shown below (except that the version will be current): 

      "CSPICE_N0035" 

   None.

      Error Free. 

   1) The routine returns "No version found." for any unknown item
      string. 

   None. 

   N.J. Bachman       (JPL)
   K.R. Gehringer     (JPL) 
   H.A. Neilan        (JPL) 

   None. 

   -CSPICE Version 2.3.0, 06-FEB-2002 (EDW) (NJB)  

      Changed the return type from (SpiceChar *) to (ConstSpiceChar *).
      Corrected example code to show use of (ConstSpiceChar *) return 
      type. Edited the header.

   -CSPICE Version 2.2.0, 03-SEP-1999 (NJB)  

      Return type changed to (SpiceChar *).  Function now cleans
      out version string before writing to it.

   -CSPICE Version 2.1.0, 08-FEB-1998 (NJB)  

      References to C2F_CreateStr_Sig were removed; code was
      cleaned up accordingly.  String checks are now done using
      the macro CHKFSTR_VAL.

   -CSPICE Version 2.0.0, 11-NOV-1997 (NJB)

      Updated to use the SPICELIB routine TKVRSN to obtain
      the version string for SPICELIB.  Updated header to remove
      outdated restrictions.  Changed example to reflect CSPICE
      version string.

   -CSPICE Version 1.0.0, 25-OCT-1997 (NJB)

      Based on SPICELIB Version 2.4.0, 31-JUL-1997 (WLT)

   Return version strings