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std::basic_istringstream::basic_istringstream

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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
Original:
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
Original:
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_istringstream
Funções de membro
Original:
Member functions
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basic_istringstream::basic_istringstream
basic_istringstream::operator=
basic_istringstream::swap
basic_istringstream::rdbuf
Seqüência de operações
Original:
String operations
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basic_istringstream::str
 
basic_istringstream( ios_base::openmode mode = ios_base::in );
(1)
basic_istringstream( const std::basic_string<CharT,Traits,Allocator>& str,
                     ios_base::openmode mode = ios_base::in );
(2)
basic_istringstream( basic_istringstream&& other );
(3) (a partir do C++ 11)
Constrói fluxo nova cadeia.
Original:
Constructs new string stream.
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1)
Constrói dispositivo nova cadeia subjacente. O objecto subjacente basic_stringbuf é construído como basic_stringbuf<Char,Traits,Allocator>(mode | ios_base::in).
Original:
Constructs new underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(mode | ios_base::in).
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2)
Usa uma cópia de str como conteúdo inicial do dispositivo de cordão subjacente. O objecto subjacente basic_stringbuf é construído como basic_stringbuf<Char,Traits,Allocator>(str, mode | ios_base::in).
Original:
Uses a copy of str as initial contents of the underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(str, mode | ios_base::in).
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3)
Mova construtor. Constrói o fluxo de arquivos com o estado de other usando semântica mover.
Original:
Move constructor. Constructs the file stream with the state of other using move semantics.
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[editar] Parâmetros

str -
string para usar como conteúdo inicial do fluxo de seqüência
Original:
string to use as initial contents of the string stream
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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
Original:
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
Original:
open for reading
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out
abrir para escrita
Original:
open for writing
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trunc
descartar o conteúdo da corrente durante a abertura
Original:
discard the contents of the stream when opening
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ate
procurar o fim do fluxo imediatamente depois de aberto
Original:
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
Original:
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
Original:
open for reading
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out
abrir para escrita
Original:
open for writing
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trunc
descartar o conteúdo da corrente durante a abertura
Original:
discard the contents of the stream when opening
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ate
procurar o fim do fluxo imediatamente depois de aberto
Original:
seek to the end of stream immediately after open
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other -
outro fluxo string para usar como fonte
Original:
another string stream to use as source
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[editar] Exemplo

#include <iostream>
#include <sstream>
int main()
{
    // default constructor (input/output stream)
    std::stringstream buf1;
    buf1 << 7;
    int n = 0;
    buf1 >> n;
    std::cout << "buf1 = " << buf1.str() << " n = " << n << '\n';
 
    // input stream
    std::istringstream inbuf("-10");
    inbuf >> n;
    std::cout << "n = " << n << '\n';
 
    // output stream in append mode (C++11)
    std::ostringstream buf2("test", std::ios_base::ate);
    buf2 << '1';
    std::cout << buf2.str() << '\n';
}

Output:

buf1 = 7 n = 7
n = -10
test1

[editar] Veja também

Obtém ou define o conteúdo do objeto subjacente corda dispositivo
Original:
gets or sets the contents of underlying string device object
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(função pública membro) [edit]
constrói um objeto basic_stringbuf
Original:
constructs a basic_stringbuf object
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(of std::basic_stringbuf função pública membro) [edit]