Espaços nominais
Variantes
Acções

std::nan, std::nanf, std::nanl

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< cpp‎ | numeric‎ | math

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C++
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
Números complexos
Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
Genéricos operações numéricas
Original:
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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(C++11)
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(C++11)
nannanfnanl
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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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Trigonometric and hyperbolic functions
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Erro e funções gamma
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Error and gamma functions
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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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Constantes de macros
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Macro constants
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Definido no cabeçalho <cmath>
float nanf( const char* arg );
 (desde C++11)
double nan( const char* arg );
 (desde C++11)
long double nanl( const char* arg );
 (desde C++11)
Converte a aplicação definida arg seqüência de caracteres para o valor correspondente NaN silencioso. O std::nan("string") chamada é equivalente ao std::strtod("NAN(string)", (char**)NULL); chamada.
Original:
Converts the implementation-defined character string arg into the corresponding quiet NaN value. The call std::nan("string") is equivalent to the call std::strtod("NAN(string)", (char**)NULL);.
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[editar] Parâmetros

arg -
cadeia de caracteres estreita identificar o conteúdo de um NaN, ou uma string vazia
Original:
narrow character string identifying the contents of a NaN, or an empty string
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[editar] Valor de retorno

O valor NaN que corresponde ao arg string de identificação ou zero se a implementação não suporta NaNs tranquilos.
Original:
The NaN value that corresponds to the identifying string arg or zero if the implementation does not support quiet NaNs.
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[editar] Veja também

(C++11)
Verifica se o número dado é NaN
Original:
checks if the given number is NaN
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(função) [edit]
[estática]
retorna um valor NaN tranquila do determinado tipo de ponto flutuante
Original:
returns a quiet NaN value of the given floating-point type
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(of std::numeric_limits função public static membro) [edit]
Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/numeric/math/nan&oldid=21274"