NAME

ecvt, fcvt, gcvt, nl_gcvt − convert floating-point number to string

SYNOPSIS

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;
int ndigit;
char ∗buf;

char ∗nl_gcvt (value, ndigit, buf, langid)
double value;
int ndigit;
char ∗buf;
int langid;

HP-UX COMPATIBILITY

Level: HP-UX/RUN ONLY

Origin: System V

Native Language Support:
8−bit data, customs, messages

DESCRIPTION

Ecvt converts value to a null-terminated string of ndigit digits and returns a pointer thereto.  The high-order digit is non-zero, unless the value is zero.  The low-order digit is rounded.  The position of the decimal point relative to the beginning of the string is stored indirectly through decpt (negative means to the left of the returned digits). The decimal point 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. 

Fcvt is identical to ecvt, except that the correct digit has been rounded for printf “%f” (FORTRAN F-format) output of the number of digits specified by ndigit.

Gcvt converts the value to a null-terminated string in the array pointed to by buf and returns buf. It attempts to produce ndigit significant digits in FORTRAN F-format if possible, otherwise E-format, ready for printing. A minus sign, if there is one, or a decimal point will be included as part of the returned string.  Trailing zeros are suppressed. 

Nl_gcvt differs from gcvt only in that it uses langid to determine what the radix character should be (e.g., ’.’ or ’,’).  If langid is not valid, or information for langid has not been installed, the radix character defaults to a period. 

SEE ALSO

printf(3S), hpnls(7), langid(7). 

BUGS

The values returned by ecvt and fcvt point to a single static data array whose content is overwritten by each call. 

Hewlett-Packard  —  last mod. May 11, 2021