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      std::copysign

      Da cppreference.com
      < 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
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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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      (C++11)
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      (C++11)(C++11)(C++11)
      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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      (C++11)(C++11)(C++11)
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      Flutuando funções de manipulação de pontos
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      Floating point manipulation functions
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      (C++11)(C++11)
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      copysign
      (C++11)
      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       copysign(float x, float y );
      		 (1) (desde C++11)
      double      copysign(double x, double y );
      		 (2) (desde C++11)
      longdouble copysign(longdouble x, longdouble y );
      		 (3) (desde C++11)
      Promoted    copysign( Arithmetic x, Arithmetic y );
      		 (4) (desde C++11)
      Compõe um valor de ponto flutuante com a magnitude de x eo sinal de y.
      Original:
      Composes a floating point value with the magnitude of x and the sign of y.
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      4)
      Se algum argumento tem tipo integral, ele é convertido para double. Se qualquer outro argumento é longdouble, em seguida, o tipo de retorno é longdouble, caso contrário é double.
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      If any argument has integral type, it is cast to double. If any other argument is longdouble, then the return type is longdouble, otherwise it is double.
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      [editar]Parâmetros

      x, y -
      valores de ponto flutuante
      Original:
      floating point values
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      [editar]Valor de retorno

      valor de ponto flutuante com a magnitude de x eo sinal de y
      Original:
      floating point value with the magnitude of x and the sign of y
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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)
      Verifica se o número dado é negativo
      Original:
      checks if the given number is negative
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      (função)[edit]
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