HP-UX Reference (11i v1 05/09) - 3 Library Functions A-M (vol 6)

l
lround(3M) lround(3M)
NAME
lround() - round to long function
SYNOPSIS
#include <math.h>
long lround(double x);
DESCRIPTION
lround() rounds its argument to the nearest integral value. An argument exactly halfway between two
integers is rounded away from zero, regardless of the current rounding direction. Rounding away from
zero also applies to the functions, round and
llround.
If the rounded value is outside the range of
long, the numeric result is unspecified.
The ISO/ANSI C committee has approved the
lround() function for inclusion in the C9X draft standard.
To use this function, compile either with the default
-Ae option or with the -Aa and -D_HPUX_SOURCE
options. Make sure your program includes <math.h>
. Link in the math library by specifying -lm on the
compiler or linker command line.
RETURN VALUE
The
lround() function returns the rounded long value.
ERRORS
No errors are defined.
SEE ALSO
ceil(3M), floor(3M), fabs(3M), fmod(3M), fegetround(3M), fesetround(3M), lrint(3M), llrint(3M), llround(3M),
rint(3M), round(3M), trunc(3M), math(5), fenv(5).
Section 3−−538 Hewlett-Packard Company − 1 − HP-UX 11i Version 1: September 2005