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0 Command: ecvt | Section: 3 | Source: UNIX v10 | File: ecvt.3
ECVT(3) Library Functions Manual ECVT(3) NAME ecvt, fcvt, gcvt - convert numbers to ascii 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 similar to ecvt and produces output for the Fortran format F*.ndigit. If decpt<=-ndigit, then the returned string is null. Oth- erwise, decpt+ndigit+1 characters (including terminating null) are re- turned. 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. ECVT(3)

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