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std::remquo

De cppreference.com
< cpp‎ | numeric‎ | math

 
 
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>
Defined in header <cmath>
float       remquo( float x, float y, int *quo );
(1) (depuis C++11)
double      remquo( double x, double y, int *quo );
(2) (depuis C++11)
long double remquo( long double x, long double y, int *quo );
(3) (depuis C++11)
Promoted    remquo( Arithmetic x, Arithmetic y, int *quo );
(4) (depuis C++11)
Calcule le reste de la division x/y opération à virgule flottante en fonction de la remainder fait. En outre, le signe et au moins tous les trois derniers bits de x/y seront stockées dans quo .
Original:
Computes the remainder of the floating point division operation x/y as the remainder function does. Additionally, the sign and at least the three of the last bits of x/y will be stored in quo.
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4)
Si un argument est de type intégral, il est jeté à double. Si aucun autre argument est long double, puis le type de retour est long double, sinon il est double
Original:
If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double
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Sommaire

[modifier] Paramètres

x, y -
valeurs à virgule flottante
Original:
floating point values
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quo -
pointeur vers une valeur entière pour stocker des bits de x/y po
Original:
pointer to an integer value to store some bits of x/y in
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[modifier] Retourne la valeur

reste des arguments de division
Original:
remainder of dividing arguments
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[modifier] Notes

Cette fonction est utile lorsque la mise en œuvre des fonctions périodiques avec la période exactement représentable comme une valeur à virgule flottante: le calcul sin(πx) pour un x très grand, en appelant directement std::sin peut entraîner une erreur importante, mais si l'argument de la fonction est d'abord réduite à std::remquo, les bits de poids faible du quotient peut être utilisée pour déterminer le signe et le reste peut être utilisé pour calculer la valeur de la haute précision .
Original:
This function is useful when implementing periodic functions with the period exactly representable as a floating-point value: when calculating sin(πx) for a very large x, calling std::sin directly may result in a large error, but if the function argument is first reduced with std::remquo, the low-order bits of the quotient may be used to determine the sign and the remainder may be used to calculate the value with high precision.
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[modifier] Voir aussi

(C++11)
signé reste de l'opération de division
Original:
signed remainder of the division operation
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(fonction) [edit]
reste de l'opération de division à virgule flottante
Original:
remainder of the floating point division operation
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(fonction) [edit]
le quotient et le reste de la division entière
Original:
the quotient and remainder of integer division
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(fonction) [edit]