Espacios de nombres
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ilogb

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< c‎ | numeric‎ | math

 
 
 
Funciones matemáticas comunes
Funciones
Original:
Functions
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Operaciones básicas
Original:
Basic operations
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remainder(C99)
remquo(C99)
fma(C99)
fmax(C99)
fmin(C99)
fdim(C99)
nan
nanf
nanl
(C99)
(C99)
(C99)
Funciones exponenciales
Original:
Exponential functions
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exp
exp2(C99)
expm1(C99)
log
log10
log1p(C99)
log2(C99)
Funciones de energía
Original:
Power functions
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sqrt
cbrt(C99)
hypot(C99)
pow
Funciones trigonométricas e hiperbólicas
Original:
Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C99)
acosh(C99)
atanh(C99)
Error gamma y funciones
Original:
Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
tgamma(C99)
Más cerca de las operaciones con enteros en coma flotante
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)
Funciones de punto flotante de manipulación
Original:
Floating point manipulation functions
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ldexp
scalbn
scalbln
(C99)
(C99)
ilogb(C99)
logb(C99)
Clasificación
Original:
Classification
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fpclassify(C99)
isfinite(C99)
isinf(C99)
isnan(C99)
isnormal(C99)
signbit(C99)
Constantes Macro
Original:
Macro constants
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Defined in header <math.h>
int ilogbf( float arg );
int ilogb( double arg );
int ilogbl( long double arg );
#define FP_ILOGB0 /*implementation-defined*/
#define FP_ILOGBNAN /*implementation-defined*/
Extrae el valor del exponente de la arg argumento de punto flotante, y la devuelve como un valor entero con signo. Formalmente, el resultado es la parte integral de log
r
|arg|
como un valor con signo integral, para no-cero arg, donde r es FLT_RADIX .
Original:
Extracts the value of the exponent from the floating-point argument arg, and returns it as a signed integer value. Formally, the result is the integral part of log
r
|arg|
as a signed integral value, for non-zero arg, where r is FLT_RADIX.
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Contenido

[editar] Parámetros

arg -
flotando valor en puntos
Original:
floating point value
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[editar] Valor de retorno

El exponente de punto flotante, echó a entero .
Original:
The floating-point exponent, cast to integer.
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Error de dominio o rango puede producirse si arg es cero, se devuelve FP_ILOGB0 en ese caso .
Original:
Domain or range error may occur if arg is zero, FP_ILOGB0 is returned in that case.
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Error de dominio o rango puede producirse si arg es infinito, MAX_INT se devuelve en ese caso .
Original:
Domain or range error may occur if arg is infinite, MAX_INT is returned in that case.
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Error de dominio o rango puede ocurrir si arg es NaN, se devuelve FP_ILOGBNAN en ese caso .
Original:
Domain or range error may occur if arg is NaN, FP_ILOGBNAN is returned in that case.
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Si el resultado no se puede representar como int, el resultado es indefinido .
Original:
If the result cannot be represented as int, the result is undefined.
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[editar] Notas

El valor del exponente devuelto por ilogb siempre es 1 menos que el exponente reajustada por frexp debido a los requisitos de normalización diferentes: para la e exponente devuelto por ilogb, |arg*r-e
|
es entre 1 y r (típicamente entre 1 y 2), pero para la exponente e devuelto por frexp, |arg*2-e
|
es entre 0.5 y 1 .
Original:
The value of the exponent returned by ilogb is always 1 less than the exponent retuned by frexp because of the different normalization requirements: for the exponent e returned by ilogb, |arg*r-e
|
is between 1 and r (typically between 1 and 2), but for the exponent e returned by frexp, |arg*2-e
|
is between 0.5 and 1.
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[editar] Ejemplo

[editar] Ver también

se descompone un número en mantisa y una potencia de 2
Original:
decomposes a number into significand and a power of 2
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(función) [edit]
(C99)
extrae exponente de la serie
Original:
extracts exponent of the number
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(función) [edit]
(C99)
(C99)
multiplica un número por FLT_RADIX elevado a una potencia
Original:
multiplies a number by FLT_RADIX raised to a power
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(función) [edit]