gcvt man page on Ultrix

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ecvt(3)								       ecvt(3)

Name
       ecvt, fcvt, gcvt - output conversion

Syntax
       char *ecvt(value, ndigit, decpt, sign)
       double value;
       int ndigit, *decpt, *sign;

       char *fcvt(value, ndigit, decpt, sign)
       double value;
       int ndigit, *decpt, *sign;

       char *gcvt(value, ndigit, buf)
       double value;
       char *buf;

Description
       The  routine  converts  the value to a null-terminated string of ndigit
       ASCII digits and returns a pointer thereto.  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).   If
       the sign of the result is negative, the word pointed to by sign is non-
       zero, otherwise it is zero.  The low-order digit is rounded.

       The routine is identical to except that	the  correct  digit  has  been
       rounded	for  FORTRAN F-format output of the number of digits specified
       by ndigits.

       The routine converts the value to a null-terminated ASCII string in buf
       and  returns  a pointer to buf.	It attempts to produce ndigit signifi‐
       cant digits in FORTRAN F format if  possible,  otherwise	 E  format  is
       used, ready for printing.  Trailing zeros may be suppressed.

       The  symbol  used  to  represent a radix character is obtained from the
       last successful call to category The symbol can be determined by	 call‐
       ing:
       nl_langinfo (RADIXCHAR);

       If category has not been called successfully, or if the radix character
       is not defined for a supported language, the radix  character  defaults
       to a period (.).

   International Environment
       LC_NUMERIC     If  this environment is set and valid, uses the interna‐
		      tional language database	named  in  the	definition  to
		      determine radix character rules.

       LANG	      If  this environment is set and valid, uses the interna‐
		      tional language database	named  in  the	definition  to
		      determine radix character rules. If is defined, its def‐
		      inition supercedes the definition of

Restrictions
       The return values point to static data whose content is overwritten  by
       each call.

See Also
       setlocale(3), nl_langinfo(3int), printf(3int), printf(3s)
       Guide to Developing International Software

								       ecvt(3)
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