NAN - cppreference.com
Espaços nominais
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      NAN

      De cppreference.com

      <metanoindex/>

       
      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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      (C++11)
       
      Funções matemáticas comuns
      Funções
      Original:
      Functions
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      Operações básicas
      Original:
      Basic operations
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      (C++11)
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      (C++11)(C++11)(C++11)
      Funções exponenciais
      Original:
      Exponential functions
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      (C++11)
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      Funções de poder
      Original:
      Power functions
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      (C++11)
      (C++11)
      Funções trigonométricas e hiperbólicas
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      Trigonometric and hyperbolic functions
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      (C++11)
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      (C++11)
      Erro e funções gamma
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      Error and gamma functions
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      (C++11)
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      (C++11)
      Número inteiro mais próximo de operações de ponto flutuante
      Original:
      Nearest integer floating point operations
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      (C++11)(C++11)(C++11)
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      (C++11)(C++11)(C++11)
      Flutuando funções de manipulação de pontos
      Original:
      Floating point manipulation functions
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      Classificação / Comparação
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      Classification/Comparison
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      (C++11)
      (C++11)
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      (C++11)
      Constantes de macros
      Original:
      Macro constants
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      (C++11)(C++11)(C++11)(C++11)(C++11)
       
      <tbody> </tbody>
      Definido no cabeçalho <cmath>
      #define NAN /*implementation defined*/
      		 (desde C++11)
      O NAN macro expande a expressão constante de float tipo que avalia a um silêncio não-número um-valor (QNAN). Se a aplicação não suporta QNaNs, esta constante macro não está definida.
      Original:
      The macro NAN expands to constant expression of type float which evaluates to a quiet not-a-number (QNaN) value. If the implementation does not support QNaNs, this macro constant is not defined.
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