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Manual page for ECVT(3)

ecvt, fcvt, gcvt - output conversion

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; char *buf;

DESCRIPTION

Ecvt converts the value to a null-terminated string of ndigit ASCII digits and returns a pointer thereto. 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). 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.

Fcvt is identical to ecvt, except that the correct digit has been rounded for Fortran F-format output of the number of digits specified by \(*_ndigits.

Gcvt converts the value to a null-terminated ASCII string in buf and returns a pointer to buf. It attempts to produce ndigit significant digits in Fortran F format if possible, otherwise E format, ready for printing. Trailing zeros may be suppressed.

SEE ALSO

printf(3)

BUGS

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

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