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std::scalbn, std::scalbln

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}}}
Original:
{{{2}}}
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Fonctions
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Functions
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Opérations de base
Original:
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
Original:
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
Original:
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
Original:
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
Original:
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)
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</div>
Defined in header <cmath>
float       scalbn( float x, int exp );
(depuis C++11)
double      scalbn( double x, int exp );
(depuis C++11)
long double scalbn( long double x, int exp );
(depuis C++11)
double      scalbn( Integral x, int exp );
(depuis C++11)
float       scalbln( float x, long exp );
(depuis C++11)
double      scalbln( double x, long exp );
(depuis C++11)
long double scalbln( long double x, long exp );
(depuis C++11)
double      scalbln( Integral x, long exp );
(depuis C++11)
Multiplie une valeur à virgule flottante x par FLT_RADIX porté à exp pouvoir. Le système binaire est équivalent à ldexp()
Original:
Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to ldexp()
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[modifier] Paramètres

arg -
valeur du point flottant
Original:
floating point value
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exp -
valeur entière
Original:
integer value
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[modifier] Retourne la valeur

x×FLT_RADIXexp rendements
Original:
returns x×FLT_RADIXexp
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Si le résultat est trop grand pour le type sous-jacent, une erreur d'intervalle se produit et HUGE_VAL est retourné .
Original:
If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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[modifier] Voir aussi

se décompose en un certain nombre mantisse et d'une puissance de 2
Original:
decomposes a number into significand and a power of 2
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(fonction) [edit]
multiplie par un nombre 2 élevé à une puissance
Original:
multiplies a number by 2 raised to a power
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(fonction) [edit]