Espaços nominais
Variantes
    Acções

      std::boolalpha, std::noboolalpha

      Da cppreference.com
      < cpp‎ | io‎ | manip

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      C++
       
      De entrada / saída da biblioteca
      I / O manipuladores
      C estilo de I / O
      Buffers
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      Buffers
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      (obsoleta)
      Streams
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      Streams
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      Abstrações
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      Abstractions
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      File I / O
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      File I/O
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      Cordas I / O
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      String I/O
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      Matriz de I / O
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      Array I/O
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      (obsoleta)
      (obsoleta)
      (obsoleta)
      Tipos
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      Types
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      Interface de categoria de erro
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      Error category interface
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      (C++11)
      (C++11)
       
      Entrada / saída manipuladores
      De ponto flutuante de formatação
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      Floating-point formatting
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      Formatação inteiro
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      Integer formatting
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      Formatação booleana
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      Boolean formatting
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      boolalphanoboolalpha
      Largura do campo e controle de preenchimento
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      Field width and fill control
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      Outra formatação
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      Other formatting
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      Espaços de processamento
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      Whitespace processing
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      Saída de descarga
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      Output flushing
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      Sinalizadores de status manipulação
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      Status flags manipulation
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      Tempo e dinheiro I / O
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      Time and money I/O
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
       
      Definido no cabeçalho <ios>
      std::ios_base& boolalpha(std::ios_base& str );
      		 (1)
      std::ios_base& noboolalpha(std::ios_base& str );
      		 (2)
      1)
      permite a bandeira boolalpha no str fluxo, como se chamando str.setf(std::ios_base::boolalpha)
      Original:
      enables the boolalpha flag in the stream str as if by calling str.setf(std::ios_base::boolalpha)
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      2)
      desabilita a bandeira boolalpha no str fluxo, como se chamando str.unsetf(std::ios_base::boolalpha)
      Original:
      disables the boolalpha flag in the stream str as if by calling str.unsetf(std::ios_base::boolalpha)
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      std::boolalpha é um manipulador de I / O, por isso pode ser chamado com uma expressão como out << std::boolalpha para qualquer out de std::basic_ostream tipo ou com uma expressão como in >> std::boolalpha para qualquer tipo de instd::basic_istream.
      Original:
      std::boolalpha is an I/O manipulator, so it may be called with an expression such as out << std::boolalpha for any out of type std::basic_ostream or with an expression such as in >> std::boolalpha for any in of type std::basic_istream.
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      Índice

      [editar]Parâmetros

      str -
      referência ao fluxo de E / S
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      reference to I/O stream
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      [editar]Valor de retorno

      str (referência ao fluxo após a manipulação)
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      str (reference to the stream after manipulation)
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      [editar]Exemplo

      #include <sstream>#include <locale>#include <iostream>int main(){// boolalpha outputstd::cout<< std::boolalpha<<"boolalpha true: "<<true<<'\n'<<"boolalpha false: "<<false<<'\n';std::cout<< std::noboolalpha<<"noboolalpha true: "<<true<<'\n'<<"noboolalpha false: "<<false<<'\n';// booalpha parsebool b1, b2;std::istringstream is("true false"); is >> std::boolalpha>> b1 >> b2;std::cout<<'\"'<< is.str()<<"\" parsed as "<< b1 <<' '<< b2 <<'\n';}

      Saída: 

      boolalpha true: true boolalpha false: false noboolalpha true: 1 noboolalpha false: 0 "true false" parsed as 1 0

      [editar]Veja também

      Predefinição:cpp/locale/numpunct/dsc do truenamePredefinição:cpp/locale/numpunct/dsc do falsename
      limpa os sinalizadores ios_base especificados
      Original:
      clears the specified ios_base flags
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      (função)[edit]
      define os sinalizadores ios_base especificados
      Original:
      sets the specified ios_base flags
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      (função)[edit]
      Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/io/manip/boolalpha&oldid=20813"
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