Espaços nominais
Variantes
Acções

std::basic_filebuf::open

Da cppreference.com
< cpp‎ | io‎ | basic filebuf

 
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
Original:
Buffers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
Original:
Streams
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Abstrações
Original:
Abstractions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ifstream
basic_ofstream
basic_fstream
Cordas I / O
Original:
String I/O
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
Original:
Array I/O
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
Original:
Types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
streamoff
streamsize
fpos
Interface de categoria de erro
Original:
Error category interface
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
iostream_category(C++11)
io_errc(C++11)
 
std::basic_filebuf
Membro funções públicas
Original:
Public member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_filebuf::basic_filebuf
basic_filebuf::~basic_filebuf
basic_filebuf::operator=(C++11)
basic_filebuf::swap(C++11)
basic_filebuf::is_open
basic_filebuf::open
basic_filebuf::close
Protegido funções de membro
Original:
Protected member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_filebuf::showmanyc
basic_filebuf::underflow
basic_filebuf::uflow
basic_filebuf::pbackfail
basic_filebuf::overflow
basic_filebuf::setbuf
basic_filebuf::seekoff
basic_filebuf::seekpos
basic_filebuf::sync
basic_filebuf::imbue
Não-membros funções
Original:
Non-member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
swap(std::basic_filebuf)(C++11)
 
std::basic_filebuf<CharT, Traits>* open( const char* s, std::ios_base::openmode mode )
(1)
std::basic_filebuf<CharT, Traits>* open( const std::string& s, std::ios_base::openmode mode )
(2) (a partir do C++ 11)
Abre o arquivo cujo nome é dado por
Original:
Opens the file whose name is given by
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
1)
terminada em nulo s corda estreita byte
Original:
the null-terminated narrow byte string s
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
2)
terminada em nulo s.c_str() corda estreita byte
Original:
the null-terminated narrow byte string s.c_str()
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
como se ligando std::fopen(s, modestring), onde modestring é determinada como se segue:
Original:
as if by calling std::fopen(s, modestring), where modestring is determined as follows:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
modestring
Original:
modestring
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
openmode & ~ate
"r" in
"w" out, out|trunc
"a" app, out|app
"r+" out|in
"w+" out|in|trunc
"a+" out|in|app, in|app
"rb" binary|in
"wb" binary|out, binary|out|trunc
"ab" binary|app, binary|out|app
"r+b" binary|out|in
"w+b" binary|out|in|trunc
"a+b" binary|out|in|app, binary|in|app
Se openmode não é um dos modos listados, o open() falhar.
Original:
If openmode is not one of the modes listed, the open() fails.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Se a operação for bem-sucedido e openmode & std::ios_base::ate != 0 aberto (o bit é definido ate), reposiciona a posição do arquivo para o final do arquivo, como se chamando std::fseek(file, 0, SEEK_END). Se o reposicionamento falhar, chama close() e retorna um ponteiro nulo para indicar falha.
Original:
If the open operation succeeds and openmode & std::ios_base::ate != 0 (the ate bit is set), repositions the file position to the end of file, as if by calling std::fseek(file, 0, SEEK_END). If the repositioning fails, calls close() and returns a null pointer to indicate failure.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Se o arquivo associado já estava aberta, retorna um ponteiro nulo imediatamente.
Original:
If the associated file was already open, returns a null pointer right away.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Índice

[editar] Parâmetros

s -
o nome do arquivo para abrir
Original:
the file name to open
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
openmode -
o modo de abertura de arquivo, um binário OR dos modos std::ios_base
Original:
the file opening mode, a binary OR of the std::ios_base modes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Valor de retorno

*this em caso de sucesso, um ponteiro nulo em caso de falha.
Original:
*this on success, a null pointer on failure.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Notas

open() é normalmente chamado através do construtor ou a função de membro open() de std::basic_fstream.
Original:
open() is typically called through the constructor or the open() member function of std::basic_fstream.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Exemplo

[editar] Veja também

checks if the associated file is open
(função pública membro) [edit]
esvaziará o buffer área e colocar fecha o arquivo associado
Original:
flushes the put area buffer and closes the associated file
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(função pública membro) [edit]