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std::ceil

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C++
 
Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
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iota (C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Fonctions mathématiques courantes
{{{1}}}
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{{{2}}}
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Fonctions
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Functions
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Opérations de base
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Basic operations
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remainder (C++11)
remquo (C++11)
fma (C++11)
fmax (C++11)
fmin (C++11)
fdim (C++11)
nan
nanf
nanl		 (C++11)
(C++11)
(C++11)
Les fonctions exponentielles
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Exponential functions
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exp
exp2 (C++11)
expm1 (C++11)
log
log10
log1p (C++11)
log2 (C++11)
Les fonctions de puissance
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Power functions
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sqrt
cbrt (C++11)
hypot (C++11)
pow
Les fonctions trigonométriques et hyperboliques
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh (C++11)
acosh (C++11)
atanh (C++11)
{{{1}}}
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{{{2}}}
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Erreur fonctions et gamma
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Error and gamma functions
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erf (C++11)
erfc (C++11)
lgamma (C++11)
tgamma (C++11)
Entier le plus proche opérations en virgule flottante
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Nearest integer floating point operations
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ceil
floor
round
lround
llround		 (C++11)
(C++11)
(C++11)
trunc (C++11)
nearbyint (C++11)
rint
lrint
llrint		 (C++11)
(C++11)
(C++11)
Flottant fonctions de manipulation de points
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Floating point manipulation functions
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ldexp
scalbn
scalbln		 (C++11)
(C++11)
ilogb (C++11)
logb (C++11)
frexp
modf
nextafter
nexttoward		 (C++11)
(C++11)
copysign (C++11)
Classification / Comparaison
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Classification/Comparison
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fpclassify (C++11)
isfinite (C++11)
isinf (C++11)
isnan (C++11)
isnormal (C++11)
signbit (C++11)
isgreater (C++11)
isgreaterequal (C++11)
isless (C++11)
islessequal (C++11)
islessgreater (C++11)
isunordered (C++11)
Macro constantes
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Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		 (C++11)
(C++11)
(C++11)
(C++11)
(C++11)
</div>
 
</div>
Défini dans l'en-tête <cmath>
float       ceil( float arg );
double      ceil( double arg );
long double ceil( long double arg );
double      ceil( Integral arg );
 (depuis C++11)
Entier le plus proche calcule pas moins de arg .
Original:
Computes nearest integer not less than arg.
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Sommaire

Paramètres

arg -
valeur du point flottant
Original:
floating point value
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Retourne la valeur

Le plus proche entier supérieur ou égal arg
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Nearest integer not less than arg
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[[Image:
Retourne la valeur
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{{{2}}}
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|200x200px]]
Argument

Notes

Si l'argument est infini (positif ou négatif) ou zéro (positif ou négatif), la valeur de retour est le même que l'argument .
Original:
If the argument is infinity (positive or negative) or zero (positive or negative), the return value is the same as the argument.
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Représentable le plus élevé valeurs à virgule flottante sont des nombres entiers exacts dans tous les standards des formats à virgule flottante, de sorte que cette fonction ne jamais débordements .
Original:
The largest representable floating-point values are exact integers in all standard floating-point formats, so this function never overflows.
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Cette fonction peut, mais n'est pas tenu de, lever FE_INEXACT exceptions de virgule flottante pour les arguments non entiers .
Original:
This function may, but is not required to, raise FE_INEXACT floating-point exceptions for non-integer arguments.
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Exemple

#include <cmath>
#include <iostream>
 
int main()
{
    double a = 12.0;
    std::cout << std::fixed;
    std::cout << std::ceil(12.0) << '\n';
    std::cout << std::ceil(12.1) << '\n';
    std::cout << std::ceil(12.5) << '\n';
    std::cout << std::ceil(12.9) << '\n';
    std::cout << std::ceil(13.0) << '\n';}

Résultat : 

12.000000
13.000000
13.000000
13.000000
13.000000

Voir aussi

Modèle:cpp/numeric/math/dcl list floorModèle:cpp/numeric/math/dcl list truncModèle:cpp/numeric/math/dcl list roundModèle:cpp/numeric/math/dcl list rintModèle:cpp/numeric/math/dcl list nearbyint
Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/numeric/math/ceil&oldid=41669 »