The
ecvt()
function converts number to a null-terminated
string of ndigits digits (where ndigits is reduced to a
system-specific limit determined by the precision of a
double),
and returns a pointer to the string.
The high-order digit is non-zero, unless
number
is zero.
The low order digit is rounded.
The string itself does not contain a decimal point; however,
the position of the decimal point relative to the start of the string
is stored in *decpt.
A negative value for *decpt means that
the decimal point is to the left of the start of the string.
If the sign of
number is negative, *sign is set to a non-zero value,
otherwise it is set to 0.
If
number
is zero, it is unspecified whether *decpt is 0 or 1.
The
fcvt()
function is identical to
ecvt(),
except that
ndigits specifies the number of digits after the decimal point.
RETURN VALUE
Both the
ecvt()
and
fcvt()
functions return a pointer to a
static string containing the ASCII representation of number.
The static string is overwritten by each call to
ecvt()
or
fcvt().
CONFORMING TO
SVr2;
marked as LEGACY in POSIX.1-2001.
POSIX.1-2008 removes the specifications of
ecvt()
and
fcvt().
NOTES
These functions are obsolete.
Instead,
sprintf(3)
is recommended.
Linux libc4 and libc5 specified the type of
ndigits
as
size_t.
Not all locales use a point as the radix character ("decimal point").
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
