LROUND(3) Linux Programmers Manual LROUND(3)
NAME
lround, lroundf, lroundl, llround, llroundf, llroundl  round to near
est integer, away from zero
SYNOPSIS
#include
long int lround(double x);
long int lroundf(float x);
long int lroundl(long double x);
long long int llround(double x);
long long int llroundf(float x);
long long int llroundl(long double x);
Link with lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
All functions shown above: _XOPEN_SOURCE >= 600  _ISOC99_SOURCE; or
cc std=c99
DESCRIPTION
These functions round their argument to the nearest integer value,
rounding away from zero, regardless of the current rounding direction.
If x is infinite or NaN, or if the rounded value is outside the range
of the return type, the numeric result is unspecified. A domain error
may occur if the magnitude of x is too large.
RETURN VALUE
The rounded integer value. Note that unlike round(3), ceil(3), etc.,
the return type of these functions differs from that of their argu
ments.
ERRORS
EDOM The magnitude of x is too large and (math_errhandling &
MATH_ERRNO) is nonzero.
CONFORMING TO
C99.
SEE ALSO
ceil(3), floor(3), lrint(3), nearbyint(3), rint(3), round(3)
COLOPHON
This page is part of release 3.05 of the Linux manpages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/manpages/.
20070726 LROUND(3)
