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std::scalbn, std::scalbln

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< cpp‎ | numeric‎ | math

 
 
Numéricos biblioteca
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Floating-point medio ambiente
Los números complejos
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En tiempo de compilación aritmética racional (C++11)
Genéricos operaciones numéricas
Original:
Generic numeric operations
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iota(C++11)
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Funciones matemáticas comunes
Funciones
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Functions
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Operaciones básicas
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Basic operations
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remainder(C++11)
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fma(C++11)
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Funciones exponenciales
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Exponential functions
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exp
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Funciones de energía
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Power functions
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Más cerca de las operaciones con enteros en coma flotante
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Nearest integer floating point operations
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Funciones de punto flotante de manipulación
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Floating point manipulation functions
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ldexp
scalbn
scalbln
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(C++11)
ilogb(C++11)
logb(C++11)
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copysign(C++11)
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isgreaterequal(C++11)
isless(C++11)
islessequal(C++11)
islessgreater(C++11)
isunordered(C++11)
Constantes Macro
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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)
 
Defined in header <cmath>
float       scalbn( float x, int exp );
(desde C++11)
double      scalbn( double x, int exp );
(desde C++11)
long double scalbn( long double x, int exp );
(desde C++11)
double      scalbn( Integral x, int exp );
(desde C++11)
float       scalbln( float x, long exp );
(desde C++11)
double      scalbln( double x, long exp );
(desde C++11)
long double scalbln( long double x, long exp );
(desde C++11)
double      scalbln( Integral x, long exp );
(desde C++11)
Multiplica un valor de punto flotante por x FLT_RADIX elevado a exp poder. El sistema binario es equivalente a 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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[editar] Parámetros

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

vuelve x×FLT_RADIXexp
Original:
returns x×FLT_RADIXexp
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Si el resultado es demasiado grande para el tipo subyacente, se produce error de rango y devuelve HUGE_VAL .
Original:
If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
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[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]
multiplica un número por 2 elevado a una potencia
Original:
multiplies a number by 2 raised to a power
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(función) [edit]