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lroundl (3)
  • lroundl (3) ( FreeBSD man: Библиотечные вызовы )
  • lroundl (3) ( Русские man: Библиотечные вызовы )
  • >> lroundl (3) ( Linux man: Библиотечные вызовы )
  • lroundl (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    lround, lroundf, lroundl, llround, llroundf, llroundl - round to
    nearest integer, away from zero
     
    

    SYNOPSIS

    #include <math.h>
    
    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 (see fenv(3)).

    Note that unlike round(3), ceil(3), etc., the return type of these functions differs from that of their arguments.  

    RETURN VALUE

    These functions return the rounded integer value.

    If x is a NaN or an infinity, or the rounded value is too large to be stored in a long (long long in the case of the ll* functions) then a domain error occurs, and the return value is unspecified.  

    ERRORS

    See math_error(7) for information on how to determine whether an error has occurred when calling these functions.

    The following errors can occur:

    Domain error: x is a NaN or infinite, or the rounded value is too large
    An invalid floating-point exception (FE_INVALID) is raised.

    These functions do not set errno.  

    VERSIONS

    These functions first appeared in glibc in version 2.1.  

    CONFORMING TO

    C99, POSIX.1-2001.  

    SEE ALSO

    ceil(3), floor(3), lrint(3), nearbyint(3), rint(3), round(3)  

    COLOPHON

    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/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    VERSIONS
    CONFORMING TO
    SEE ALSO
    COLOPHON


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