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std::basic_istream::ignore

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< cpp‎ | io‎ | basic istream

 
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
Original:
Streams
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Abstrações
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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
Cordas I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
Original:
Array I/O
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istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
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Types
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streamoff
streamsize
fpos
Interface de categoria de erro
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_istream
Objetos globais
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Global objects
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cin
wcin
Funções de membro
Original:
Member functions
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basic_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator=(C++11)
Entrada formatada
Original:
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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operator>>(std::basic_istream)
 
basic_istream& ignore( std::streamsize count = 1, int_type delim = Traits::eof() );
Extratos e personagens descarta a partir do fluxo de entrada e até incluindo delim.
Original:
Extracts and discards characters from the input stream until and including delim.
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Se comporta como UnformattedInputFunction. Depois de construir e verificar o objeto de sentinela, extrai os caracteres do fluxo e descarta-los até qualquer uma das seguintes condições ocorre:
Original:
Behaves as UnformattedInputFunction. After constructing and checking the sentry object, extracts characters from the stream and discards them until any one of the following conditions occurs:
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  • final. Das condições de arquivo ocorre na seqüência de entrada (caso em que a função chama setstate(eofbit)
    Original:
    end of file conditions occurs in the input sequence (in which case the function calls setstate(eofbit)
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  • c o próximo caractere disponível na sequência de entrada é delim como determinado pelo Traits::eq_int_type(Traits::to_int_type(c), delim). delimitador O personagem é extraído e descartado (este teste é desativado se delim é Traits::eof())
    Original:
    the next available character c in the input sequence is delim as determined by Traits::eq_int_type(Traits::to_int_type(c), delim). The delimiter character is extracted and discarded (this test is disabled if delim is Traits::eof())
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Índice

[editar] Parâmetros

count -
número de caracteres a extrair
Original:
number of characters to extract
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delim -
delimitando personagem para parar a extracção em. Também é extraído .
Original:
delimiting character to stop the extraction at. It is also extracted.
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[editar] Valor de retorno

*this

[editar] Exemplo

#include <iostream>
#include <sstream>
#include <limits>
int main()
{
    std::istringstream input("1\n"
                             "some non-numeric input\n"
                             "2\n");
    for(;;) {
        int n;
        input >> n;
 
        if(input.eof() || input.bad())
            break;
        else if(input.fail()) {
            input.clear(); // unset failbit
            input.ignore(std::numeric_limits<std::streamsize>::max(), '\n'); // skip bad input
        } else
            std::cout << n << '\n';
    }
}

Output:

1
2

[editar] Veja também

extratos personagens
Original:
extracts characters
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(função pública membro) [edit]
extratos de caracteres até o caráter dado foi encontrado
Original:
extracts characters until the given character is found
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(função pública membro) [edit]