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scalbn, scalbln

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< c‎ | numeric‎ | math

 
 
 
Fonctions mathématiques courantes
Fonctions
Original:
Functions
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Opérations de base
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Basic operations
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remainder (C99)
remquo (C99)
fma (C99)
fmax (C99)
fmin (C99)
fdim (C99)
nan
nanf
nanl
(C99)
(C99)
(C99)
Les fonctions exponentielles
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Exponential functions
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exp
exp2 (C99)
expm1 (C99)
log
log10
log1p (C99)
log2 (C99)
Les fonctions de puissance
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Power functions
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sqrt
cbrt (C99)
hypot (C99)
pow
Les fonctions trigonométriques et hyperboliques
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh (C99)
acosh (C99)
atanh (C99)
Erreur fonctions et gamma
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Error and gamma functions
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erf (C99)
erfc (C99)
lgamma (C99)
tgamma (C99)
Entier le plus proche opérations en virgule flottante
Original:
Nearest integer floating point operations
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ceil
floor
round
lround
llround
(C99)
(C99)
(C99)
trunc (C99)
nearbyint (C99)
rint
lrint
llrint
(C99)
(C99)
(C99)
Flottant fonctions de manipulation de points
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Floating point manipulation functions
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ldexp
scalbn
scalbln
(C99)
(C99)
ilogb (C99)
logb (C99)
Classification
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Classification
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fpclassify (C99)
isfinite (C99)
isinf (C99)
isnan (C99)
isnormal (C99)
signbit (C99)
Macro constantes
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Macro constants
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C99)
(C99)
(C99)
(C99)
(C99)
 
Defined in header <cmath>
float       scalbnf( float x, int exp );
double      scalbn( double x, int exp );
long double scalbnl( long double x, int exp );
float       scalblnf( float x, long exp );
double      scalbln( double x, long exp );
long double scalblnl( long double x, long exp );
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

Retours x×FLT_RADIXexp .
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]