ilogb

 

C

Lenguaje

Encabezados

Soporte de tipos

Utilidades del programa

Funciones variádicas

Gestión de errores

Gestión de memoria dinámica

Utilidades de fecha y hora

Biblioteca de cadenas de caracteres

Algoritmos

Números

Soporte de entrada/salida

Soporte de localización

Operaciones atómicas(C11)

Soporte de procesos(C11)

Especificaciones Técnicas

 

Números

Funciones matemáticas comunes

Entorno de coma flotante

Generación de números pseudo-aleatorios

Aritmética de números complejos

Matemáticas de tipo genérico

 

Funciones matemáticas comunes

Funciones Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Operaciones básicas Original: Basic operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abslabsllabsimaxabs (C99) fabs divldivlldivimaxdiv (C99) fmod	remainder (C99) remquo (C99) fma (C99) fmax (C99) fmin (C99) fdim (C99) nannanfnanl (C99)(C99)(C99)
Funciones exponenciales Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp exp2 (C99) expm1 (C99)	log log10 log1p (C99) log2 (C99)
Funciones de energía Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sqrt cbrt (C99)	hypot (C99) pow
Funciones trigonométricas e hiperbólicas Original: Trigonometric and hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C99) acosh (C99) atanh (C99)
Error gamma y funciones Original: Error and gamma functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
erf (C99) erfc (C99)	lgamma (C99) tgamma (C99)
Más cerca de las operaciones con enteros en coma flotante Original: Nearest integer floating point operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ceil floor roundlroundllround (C99)(C99)(C99)	trunc (C99) nearbyint (C99) rintlrintllrint (C99)(C99)(C99)
Funciones de punto flotante de manipulación Original: Floating point manipulation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ldexp scalbnscalbln (C99)(C99) ilogb (C99) logb (C99)	frexp modf nextafternexttoward (C99)(C99) copysign (C99)
Clasificación Original: Classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fpclassify (C99)
isfinite (C99)
isinf (C99)
isnan (C99)
isnormal (C99)
signbit (C99)
Constantes Macro Original: Macro constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
HUGE_VALFHUGE_VALHUGE_VALL (C99)(C99)	FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITEFP_NAN (C99)(C99)(C99)(C99)(C99)

 

Definido en el archivo de encabezado <math.h>
int ilogbf(float arg );		(desde C99)
int ilogb(double arg );		(desde C99)
int ilogbl(longdouble arg );		(desde C99)
#define FP_ILOGB0 /*implementation-defined*/		(desde C99)
#define FP_ILOGBNAN /*implementation-defined*/		(desde C99)

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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Parámetros

arg

-

flotando valor en puntos Original: floating point value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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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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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Ver también

frexp	se descompone un número en mantisa y una potencia de 2 Original: decomposes a number into significand and a power of 2 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
logb (C99)	extrae exponente de la serie Original: extracts exponent of the number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
scalbnscalbln (C99)(C99)	multiplica un número por FLT_RADIX elevado a una potencia Original: multiplies a number by FLT_RADIX raised to a power The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
Documentación de C++ para ilogb