Man Lround en anglais
LROUND(3)                  Linux Programmer's 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 non-zero.

 

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  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



                                  2007-07-26                         LROUND(3)