/* $DOC$
   $NAME$
      XToC()
   $CATEGORY$
      CT3 miscellaneous functions
   $ONELINER$

   $SYNTAX$
      XToC( <expValue> ) --> cValue

   $ARGUMENTS$
      <expValue> Designate an expression of some of the following data
      type: NUMBER, CHARACTER, DATE, LOGICAL.

   $RETURNS$
      XToC() return a string with the representation of data type of
      expValue.

   $DESCRIPTION$
      Each data type always returns a string with a particular fixed length:

      -----------------------------------------------------------
      Data Type    Result Length      Similar function
      -----------------------------------------------------------
      Numeric      sizeof( DOUBLE )   FToC()
      Logical      1
      Date         8                  DToS()
      String       Unchanged
      -----------------------------------------------------------

      TODO: add documentation
   $EXAMPLES$

   $STATUS$
      Started
   $COMPLIANCE$

   $PLATFORMS$
      All
   $FILES$
      Library is hbct.
   $SEEALSO$
      CToF(), FToC()
   $END$
 */