Namespace
Varianti

std::basic_ifstream::open

Da cppreference.com.
< cpp‎ | io‎ | basic ifstream

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
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
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ifstream
Membri funzioni
Original:
Member functions
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basic_ifstream::basic_ifstream
basic_ifstream::operator=(C++11)
basic_ifstream::swap(C++11)
basic_ifstream::rdbuf
Operazioni sui file
Original:
File operations
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basic_ifstream::is_open
basic_ifstream::open
basic_ifstream::close
Non membri funzioni
Original:
Non-member functions
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basic_ifstream::swap(std::basic_ifstream)(C++11)
 
void open( const char *filename,
           ios_base::openmode mode = ios_base::in );
void open( const std::string &filename,                                  
           ios_base::openmode mode = ios_base::in );
(dal C++11)
Apre e collaboratori file con il flusso di file. Chiede clear() in caso di successo o setstate(failbit) in caso di fallimento.
Original:
Opens and associates file with the file stream. Calls clear() on success or setstate(failbit) on failure.
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La prima versione chiama efficacemente rdbuf()->open(filename, mode | ios_base::in).
Original:
The first version effectively calls rdbuf()->open(filename, mode | ios_base::in).
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La seconda versione chiama efficacemente open(filename.c_str(), mode).
Original:
The second version effectively calls open(filename.c_str(), mode).
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Indice

[modifica] Parametri

filename -
il nome del file da aprire
Original:
the name of the file to be opened
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mode -
specifica modalità di apertura flusso. E 'tipo di maschera di bit, le seguenti costanti sono definite:
Constant
Original:
Constant
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Explanation
app
cercano alla fine del flusso prima di ogni scrittura
Original:
seek to the end of stream before each write
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binary
aperto in modalità binaria
Original:
open in binary mode
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in
aprire per la lettura
Original:
open for reading
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out
aperto per la scrittura
Original:
open for writing
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trunc
scartare il contenuto del flusso durante l'apertura
Original:
discard the contents of the stream when opening
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ate
cercano di fine flusso subito dopo aperto
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:
Constant
Original:
Constant
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Explanation
app
cercano alla fine del flusso prima di ogni scrittura
Original:
seek to the end of stream before each write
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binary
aperto in modalità binaria
Original:
open in binary mode
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in
aprire per la lettura
Original:
open for reading
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out
aperto per la scrittura
Original:
open for writing
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trunc
scartare il contenuto del flusso durante l'apertura
Original:
discard the contents of the stream when opening
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ate
cercano di fine flusso subito dopo aperto
Original:
seek to the end of stream immediately after open
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Esempio

[modifica] Vedi anche

controlla se il flusso è associato un file
Original:
checks if the stream has an associated file
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(membro pubblico funzione) [edit]
chiude il file associato
Original:
closes the associated file
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(membro pubblico funzione) [edit]