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std::basic_istream::unget

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< cpp‎ | io‎ | basic istream

 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleto)
Arroyos
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Streams
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Abstracciones
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cadena de I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz I / O
Original:
Array I/O
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istrstream(obsoleto)
ostrstream(obsoleto)
strstream(obsoleto)
Tipos
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Types
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streamoff
streamsize
fpos
Error interfaz categoría
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_istream
Los objetos globales
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Global objects
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cin
wcin
Las funciones miembro
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Member functions
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basic_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator=(C++11)
Entrada con formato
Original:
Formatted input
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basic_istream::operator>>
Entrada sin formato
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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
Posicionamiento
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Positioning
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basic_istream::tellg
basic_istream::seekg
Varios
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Miscellaneous
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basic_istream::sync
basic_istream::swap(C++11)
Clases de miembros
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Member classes
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basic_istream::sentry
Terceros funciones
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Non-member functions
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operator>>(std::basic_istream)
 
basic_istream& unget();
Hace que el personaje más recientemente extraído disponible nuevamente .
Original:
Makes the most recently extracted character available again.
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Primero despeja eofbit, entonces se comporta como UnformattedInputFunction. Después de la construcción y comprobación del objeto centinela, llama rdbuf()->sungetc() .
Original:
First clears eofbit, then behaves as UnformattedInputFunction. After constructing and checking the sentry object, calls rdbuf()->sungetc().
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Si vuelve rdbuf()->sungetc() Traits::eof(), llama setstate(badbit) .
Original:
If rdbuf()->sungetc() returns Traits::eof(), calls setstate(badbit).
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En cualquier caso, establece el gcount() contador a cero .
Original:
In any case, sets the gcount() counter to zero.
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Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

*this

[editar] Ejemplo

#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';
    }
}

Output:

Got: H got again: H

[editar] Ver también

extractos personajes
Original:
extracts characters
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(miembro público función) [edit]
lee el siguiente carácter sin extraerlo
Original:
reads the next character without extracting it
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(miembro público función) [edit]
pone personaje en la corriente de entrada
Original:
puts character into input stream
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(miembro público función) [edit]