std::basic_fstream::open - cppreference.com
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      std::basic_fstream::open

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      <metanoindex/>

       
      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)
       
      std::basic_fstream
      Funções de membro
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      Member functions
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      basic_fstream::basic_fstream
      basic_fstream::operator=(C++11)
      basic_fstream::swap(C++11)
      basic_fstream::rdbuf
      Operações de arquivo
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      File operations
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      basic_fstream::is_open
      basic_fstream::open
      basic_fstream::close
      Não-membros funções
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      Non-member functions
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      basic_fstream::swap(std::basic_fstream)(C++11)
       
      <tbody> </tbody>
      void open( const char *filename, ios_base::openmode mode = ios_base::in|ios_base::out );
      void open( const std::string &filename, ios_base::openmode mode = ios_base::in|ios_base::out );
      		 (desde C++11)
      Abre e associados arquivo com o fluxo de arquivo. clear() chama de sucesso ou fracasso em setstate(failbit).
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      Opens and associates file with the file stream. Calls clear() on success or setstate(failbit) on failure.
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      A primeira versão efetivamente chama rdbuf()->open(filename, mode).
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      The first version effectively calls rdbuf()->open(filename, mode).
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      A segunda versão efetivamente chama open(filename.c_str(), mode).
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      The second version effectively calls open(filename.c_str(), mode).
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      Parâmetros

      filename -
      o nome do arquivo a ser aberto
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      the name of the file to be opened
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      mode -
      especifica o modo de fluxo aberto. Ele é o tipo de máscara de bits, as seguintes constantes são definidas:
      Constante
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      Constant
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      		 Explanation
      app
      procurar o fim do fluxo antes de cada gravação
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      seek to the end of stream before each write
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      binary
      abrir em modo binário
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      open in binary mode
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      in
      Abrir para leitura
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      open for reading
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      out
      abrir para escrita
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      open for writing
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      trunc
      descartar o conteúdo da corrente durante a abertura
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      discard the contents of the stream when opening
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      ate
      procurar o fim do fluxo imediatamente depois de aberto
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      seek to the end of stream immediately after open
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      Original:
      specifies stream open mode. It is bitmask type, the following constants are defined:
      Constante
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      Constant
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      		 Explanation
      app
      procurar o fim do fluxo antes de cada gravação
      Original:
      seek to the end of stream before each write
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      binary
      abrir em modo binário
      Original:
      open in binary mode
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      in
      Abrir para leitura
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      open for reading
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      out
      abrir para escrita
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      open for writing
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      trunc
      descartar o conteúdo da corrente durante a abertura
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      discard the contents of the stream when opening
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      ate
      procurar o fim do fluxo imediatamente depois de aberto
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      seek to the end of stream immediately after open
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      Valor de retorno

      (Nenhum)
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      (none)
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      Exemplo

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      Motivo: sem exemplo

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