Espaços nominais
Variantes
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std::signbit

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< cpp‎ | numeric‎ | math

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C++
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
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Tempo de compilação aritmética racional (C++11)
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Generic numeric operations
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Funções matemáticas comuns
Funções
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Functions
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Operações básicas
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Basic operations
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Funções exponenciais
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Exponential functions
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Funções de poder
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Power functions
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Funções trigonométricas e hiperbólicas
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Erro e funções gamma
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Número inteiro mais próximo de operações de ponto flutuante
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Nearest integer floating point operations
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Flutuando funções de manipulação de pontos
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Floating point manipulation functions
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Classificação / Comparação
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Classification/Comparison
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signbit
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Constantes de macros
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Macro constants
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Definido no cabeçalho <cmath>
bool signbit( float arg );
 (desde C++11)
bool signbit( double arg );
 (desde C++11)
bool signbit( long double arg );
 (desde C++11)


Determina se o dado arg número de ponto flutuante é negativo.
Original:
Determines if the given floating point number arg is negative.
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[editar] Parâmetros

arg -
flutuando valor de ponto
Original:
floating point value
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[editar] Valor de retorno

true arg se for negativo, false contrário
Original:
true if arg is negative, false otherwise
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[editar] Veja também
valor absoluto de um valor de ponto flutuante (|x|)
Original:
absolute value of a floating point value (|x|)
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(função) [edit]
(C++11)
copia o sinal de um valor de ponto flutuante
Original:
copies the sign of a floating point value
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(função) [edit]
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