ceil(3)                    Library Functions Manual                    ceil(3)

JMENO
       ceil, ceilf, ceill - ceiling function: smallest integral value not less
       than argument

KNIHOVNA
       Matematicka knihovna (libm, -lm)

POUZITI
       #include <math.h>

       double ceil(double x);
       float ceilf(float x);
       long double ceill(long double x);

   Pozaduje mnozinu testovacich maker pro glibc (viz feature_test_macros(7)):

       ceilf(), ceill():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || /* Od glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

POPIS
       These functions return the smallest integral value that is not less
       than x.

       For example, ceil(0.5) is 1.0, and ceil(-0.5) is 0.0.

NAVRATOVE HODNOTY
       These functions return the ceiling of x.

       If x is integral, +0, -0, NaN, or infinite, x itself is returned.

CHYBOVE STAVY
       Neobjevuji se zadne chyby. POSIX.1-2001 popisuje celou skalu chyb
       tykajicich se preteceni. Viz POZNAMKY.

ATRIBUTY
       Vysvetleni pojmu pouzitych v teto casti viz attributes(7).

       +--------------------------------------------+---------------+---------+
       |Rozhrani                                    | Atribut       | Hodnota |
       +--------------------------------------------+---------------+---------+
       |ceil(), ceilf(), ceill()                    | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDY
       C11, POSIX.1-2008.

HISTORIE
       C99, POSIX.1-2001.

       Varianta vracejici double splnuje take SVr4 a 4.3BSD, C89.

POZNAMKY
       SUSv2 and POSIX.1-2001 contain text about overflow (which might set
       errno to ERANGE, or raise an FE_OVERFLOW exception).  In practice, the
       result cannot overflow on any current machine, so this error-handling
       stuff is just nonsense.  (More precisely, overflow can happen only when
       the maximum value of the exponent is smaller than the number of
       mantissa bits.  For the IEEE-754 standard 32-bit and 64-bit
       floating-point numbers the maximum value of the exponent is 127
       (respectively, 1023), and the number of mantissa bits including the
       implicit bit is 24 (respectively, 53).)

       Celociselna hodnota vracena touto funkci muze byt prilis velka pro typ
       integer (int, long, etc.). Pokud se chcete vyhnout preteceni, ktere
       bude produkovat nedefinovane vysledky je doporuceno, aby aplikace
       provadela kontrolu rozsahu prevedene hodnoty pred tim nez ji bude
       prirazovat do promenne typu integer.

DALSI INFORMACE
       floor(3), lrint(3), nearbyint(3), rint(3), round(3), trunc(3)

PREKLAD
       Preklad teto prirucky do cestiny vytvorili Pavel Heimlich
       <tropikhajma@gmail.com>

       Tento preklad je bezplatna dokumentace; Prectete si GNU General Public
       License Version 3 <https://www.gnu.org/licenses/gpl-3.0.html> nebo
       novejsi ohledne podminek autorskych prav. Neexistuje ZADNA ODPOVEDNOST.

       Pokud narazite na nejake chyby v prekladu teto prirucky, poslete e-mail
       na adresu <translation-team-cs@lists.sourceforge.net>.

Linux man-pages 6.8             2. kvetna 2024                         ceil(3)