ultrix man page for fcvt

ecvt(3) 						     Library Functions Manual							   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  sig-
       nificant 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 international language database named in the definition to determine radix
		      character rules.

       LANG	      If this environment is set and valid, uses the international language database named in the definition  to  determine  radix
		      character rules. If is defined, its definition 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)