ilogb
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| Definido no cabeçalho <math.h>
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| int ilogbf( float arg ); |
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| int ilogb( double arg ); |
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| int ilogbl( long double arg ); |
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| #define FP_ILOGB0 /*implementation-defined*/ |
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| #define FP_ILOGBNAN /*implementation-defined*/ |
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Extrai o valor do expoente da
r|arg| como um valor assinado integral, para não-zero arg, onde é
arg argumento de ponto flutuante, e retorna como um valor inteiro assinado. Formalmente, o resultado é a parte inteira do logr|arg| como um valor assinado integral, para não-zero arg, onde é
r FLT_RADIX.Original:
Extracts the value of the exponent from the floating-point argument
r|arg| as a signed integral value, for non-zero arg, where
arg, and returns it as a signed integer value. Formally, the result is the integral part of logr|arg| as a signed integral value, for non-zero arg, where
r is FLT_RADIX.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Índice |
[editar] Parâmetros
| arg | - | flutuando valor de ponto
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. |
[editar] Valor de retorno
O expoente de ponto flutuante, molde para inteiro.
Original:
The floating-point exponent, cast to integer.
The text has been machine-translated via Google Translate.
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Erro domínio ou intervalo pode ocorrer se
arg é zero, FP_ILOGB0 é retornado, nesse caso,.Original:
Domain or range error may occur if
arg is zero, FP_ILOGB0 is returned in that case.The text has been machine-translated via Google Translate.
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Erro de domínio ou intervalo pode ocorrer se
arg é infinito, MAX_INT é devolvido em caso.Original:
Domain or range error may occur if
arg is infinite, MAX_INT is returned in that case.The text has been machine-translated via Google Translate.
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Erro de domínio ou intervalo pode ocorrer se
arg é NaN, FP_ILOGBNAN é devolvido em caso.Original:
Domain or range error may occur if
arg is NaN, FP_ILOGBNAN is returned in that case.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Se o resultado não pode ser representado como int, o resultado é indefinido.
Original:
If the result cannot be represented as int, the result is undefined.
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[editar] Notas
O valor do expoente retornado por ilogb é sempre 1 a menos do que o expoente retuned frexp por causa das exigências de normalização diferentes: para o expoente
| está entre 1 e
| é entre 0.5 e 1.
e retornado por ilogb, |arg*r-e| está entre 1 e
r (tipicamente entre 1 e 2), mas para o expoente e retornado por frexp, |arg*2-e| é entre 0.5 e 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
| is between 1 and
| is between 0.5 and 1.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[editar] Exemplo
| Esta seção está incompleta Motivo: sem exemplo |
[editar] Veja também
| decompõe um número em significand e um poder 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. (função) | |
| (C99) |
extrai expoente do número 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. (função) |
| (C99) (C99) |
multiplica um número por FLT_RADIX elevado a uma potência 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. (função) |
| C++ documentation for ilogb
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