fic arithmetic implementation.

</pre><h4><a name="Examples">Examples</a></h4><pre>

   Example(1):

      ITEMS = { 'CALENDAR', 'SYSTEM' };

      %
      % Retrieve the time definition settings.
      %
      for i=1:numel(ITEMS)

         value = <b>cspice_timdef_get</b>( ITEMS(i) );
         fprintf( '%s -&gt; %s\n',  char(ITEMS(i)), value )

      end

   MATLAB outputs:

      CALENDAR -&gt; GREGORIAN
      SYSTEM -&gt; UTC

   Example(2):

      ITEMS = { 'CALENDAR', 'SYSTEM' };

      %
      % Set 