gcvt man page on HP-UX

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ecvt(3C)							      ecvt(3C)

       ecvt(), fcvt(), gcvt() - convert floating-point number to string

   Obsolescent Interfaces
       Converts	   value  to  a	 null-terminated  string  of ndigit digits and
		   returns a pointer to the string.  The high-order  digit  is
		   non-zero, unless the value is zero.	The low-order digit is
		   rounded.  The position of the radix character  relative  to
		   the	beginning  of  the string is stored indirectly through
		   decpt (negative means to the left of the returned  digits).
		   The radix character is not included in the returned string.
		   If the sign of the result is negative, the word pointed  to
		   by sign is non-zero, otherwise it is zero.

		   One of three non-digit characters strings could be returned
		   if the converted value is out of range.  A or  is  returned
		   if  the  value is larger than the exponent can contain, and
		   is negative, or positive, respectively.  The	 third	string
		   is  returned	 if  the  number is illegal, a zero divide for
		   example.  The result value is Not A Number (NAN) and	 would
		   return a character.

       Identical to
		   except  that	 the correct digit has been rounded for printf
		   (FORTRAN F-format) output of the number of digits specified
		   by ndigit.

       Converts the
		   value  to  a null-terminated string in the array pointed to
		   by buf and returns buf.   It	 produces  ndigit  significant
		   digits  in FORTRAN F-format if possible, or E-format other‐
		   wise.  A minus sign, if required, and a radix character  is
		   included  in	 the returned string.  Trailing zeros are sup‐
		   pressed.  The radix character is  determined	 by  the  cur‐
		   rently  loaded NLS environment (see setlocale(3C)).	If has
		   not been called successfully, the default NLS  environment,
		   "C", is used (see lang(5)).	The default environment speci‐
		   fies a period as the radix character.

   Obsolescent Interfaces
       and convert floating-point number to string.

       The category determines the value of the	 radix	character  within  the
       current NLS environment.

       The values returned by and point to an array whose content is overwrit‐
       ten by subsequent calls to these interfaces by the same thread.

       and are obsolescent interfaces supported only  for  compatibility  with
       existing	 DCE  applications. New multi-threaded applications should use

       and were developed by AT&T.  was developed by AT&T and HP.

       setlocale(3C), printf(3S), lang(5), thread_safety(5), glossary(9).


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