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std::basic_istream::unget

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< cpp‎ | io‎ | basic istream

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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_istream
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_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator=(C++11)
Entrada formatada
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Formatted input
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basic_istream::operator>>
Entrada não formatado
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Unformatted input
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basic_istream::get
basic_istream::peek
basic_istream::unget
basic_istream::putback
basic_istream::getline
basic_istream::ignore
basic_istream::read
basic_istream::readsome
basic_istream::gcount
Posicionamento
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Positioning
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basic_istream::tellg
basic_istream::seekg
Diversos
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Miscellaneous
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basic_istream::sync
basic_istream::swap(C++11)
Aulas-Membros
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Member classes
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basic_istream::sentry
Não-membros funções
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Non-member functions
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basic_istream& unget();
Faz o personagem mais recentemente extraído disponível novamente.
Original:
Makes the most recently extracted character available again.
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Primeiro limpa eofbit, em seguida, se comporta como UnformattedInputFunction. Depois de construir e verificar o objeto de sentinela, chama rdbuf()->sungetc().
Original:
First clears eofbit, then behaves as UnformattedInputFunction. After constructing and checking the sentry object, calls rdbuf()->sungetc().
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Se rdbuf()->sungetc() retornos Traits::eof(), chama setstate(badbit).
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If rdbuf()->sungetc() returns Traits::eof(), calls setstate(badbit).
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Em qualquer caso, define o gcount() contador a zero.
Original:
In any case, sets the gcount() counter to zero.
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Índice

[editar] Parâmetros

(Nenhum)
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(none)
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[editar] Valor de retorno

*this

[editar] Exemplo

#include <sstream>
#include <iostream>
int main()
{
    std::istringstream s1("Hello, world.");
    char c1 = s1.get();
    if(s1.unget())
    {
        char c2 = s1.get();
        std::cout << "Got: " << c1 << " got again: " << c2 << '\n';
    }
}

Saída: 

Got: H got again: H

[editar] Veja também
extratos personagens
Original:
extracts characters
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(função pública membro) [edit]
lê o próximo caractere sem extraí-lo
Original:
reads the next character without extracting it
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(função pública membro) [edit]
coloca personagem em fluxo de entrada
Original:
puts character into input stream
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(função pública membro) [edit]
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