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      std::basic_ostream::seekp

      Da cppreference.com
      < cpp‎ | io‎ | basic ostream

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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)
       
      std::basic_ostream
      Objetos globais
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      Global objects
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      Funções de membro
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      Member functions
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      basic_ostream::basic_ostream
      basic_ostream::~basic_ostream
      basic_ostream::operator=(C++11)
      Entrada formatada
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      Formatted input
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      basic_ostream::operator<<
      Entrada não formatado
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      Unformatted input
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      basic_ostream::put
      basic_ostream::write
      Posicionamento
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      Positioning
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      basic_ostream::tellp
      basic_ostream::seekp
      Diversos
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      Miscellaneous
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      basic_ostream::flush
      basic_ostream::swap(C++11)
      Aulas-Membros
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      Member classes
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      basic_ostream::sentry
      Não-membros funções
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      Non-member functions
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      basic_ostream& seekp( pos_type pos );
      		 (1)
      basic_ostream& seekp( off_type off, std::ios_base::seekdir dir);
      		 (2)
      Define o indicador de posição de saída do objeto atual streambuf associado.
      Original:
      Sets the output position indicator of the current associated streambuf object.
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      Primeiro, constrói um objeto sentry que verifica o fluxo de erros e libera o empate () 'fluxos de saída d. (desde C++11) Posteriormente,
      Original:
      First, constructs a sentry object which checks the stream for errors and flushes the tie()'d output streams. (desde C++11) Afterwards,
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      1)
      define o indicador de posição de saída para pos valor absoluto (em relação ao início do ficheiro) chamando rdbuf()->pubseekoff(pos, std::ios_base::out). Se a chamada (pos_type)-1 retornos, executa setstate(failbit).
      Original:
      sets the output position indicator to absolute (relative to the beginning of the file) value pos by calling rdbuf()->pubseekoff(pos, std::ios_base::out). If the call returns (pos_type)-1, executes setstate(failbit).
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      2)
      define o indicador de posição de saída para compensar off relação ao dir chamando rdbuf()->pubseekoff(off, dir, std::ios_base::out). Não reportar erros.
      Original:
      sets the output position indicator to offset off relative to dir by calling rdbuf()->pubseekoff(off, dir, std::ios_base::out). Does not report errors.
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      Índice

      [editar]Parâmetros

      pos -
      posição absoluta para definir o indicador de posição de saída para .
      Original:
      absolute position to set the output position indicator to.
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      off -
      posição relativa para definir o indicador de posição de saída para .
      Original:
      relative position to set the output position indicator to.
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      dir -
      define a posição de base para aplicar a diferença relativa a. Ela pode ser uma das seguintes constantes:
      Constante
      Original:
      Constant
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      		 Explanation
      beg
      o início de um fluxo
      Original:
      the beginning of a stream
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      end
      o fim de um córrego
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      the ending of a stream
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      cur
      a posição atual do indicador de posição de fluxo
      Original:
      the current position of stream position indicator
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      Original:
      defines base position to apply the relative offset to. It can be one of the following constants:
      Constante
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      Constant
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      		 Explanation
      beg
      o início de um fluxo
      Original:
      the beginning of a stream
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      end
      o fim de um córrego
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      the ending of a stream
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      cur
      a posição atual do indicador de posição de fluxo
      Original:
      the current position of stream position indicator
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      [editar]Valor de retorno

      *this

      [editar]Exceções

      1)
      Pode lançar std::ios_base::failure em caso de falha, se exceptions()& failbit !=0.
      Original:
      May throw std::ios_base::failure in case of failure, if exceptions()& failbit !=0.
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      2)
      Não jogue a menos rdbuf()->pubseekoff() joga
      Original:
      Does not throw unless rdbuf()->pubseekoff() throws
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      [editar]Exemplo

      #include <sstream>#include <iostream>   int main(){std::ostringstream os("hello, world"); os.seekp(7); os <<'W'; os.seekp(0, std::ios_base::end); os <<'!'; os.seekp(0); os <<'H';std::cout<< os.str()<<'\n';}

      Saída: 

      Hello, World!

      [editar]Veja também

      retorna o indicador de posição de saída
      Original:
      returns the output position indicator
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      (função pública membro)[edit]
      retorna o indicador de posição de entrada
      Original:
      returns the input position indicator
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      (of std::basic_istream função pública membro)[edit]
      		 sets the input position indicator
      (of std::basic_istream função pública membro)[edit]
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