std::basic_ifstream::open – cppreference.com

std::basic_ifstream::open

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<metanoindex/>

 
C++
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(veraltet)
Streams
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Streams
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Abstraktionen
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
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Array I/O
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istrstream(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
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Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ifstream
Member-Funktionen
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Member functions
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basic_ifstream::basic_ifstream
basic_ifstream::operator=(C++11)
basic_ifstream::swap(C++11)
basic_ifstream::rdbuf
Datei-Operationen
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File operations
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basic_ifstream::is_open
basic_ifstream::open
basic_ifstream::close
Non-Member-Funktionen
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Non-member functions
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basic_ifstream::swap(std::basic_ifstream)(C++11)
 
<tbody> </tbody>
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 );
 (seit C++11)
Opens und assoziierten Datei mit dem Strom. Ruft clear() über Erfolg oder setstate(failbit) bei Ausfall .
Original:
Opens and associates file with the file stream. Calls clear() on success or setstate(failbit) on failure.
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Die erste Version effektiv nennt rdbuf()->open(filename, mode | ios_base::in).
Original:
The first version effectively calls rdbuf()->open(filename, mode | ios_base::in).
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Die zweite Version effektiv nennt open(filename.c_str(), mode) .
Original:
The second version effectively calls open(filename.c_str(), mode).
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Parameter

filename -
der Name der Datei, die geöffnet werden kann
Original:
the name of the file to be opened
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mode -
legt Stream offenen Modus. Es ist Bitmaske Typ sind die folgenden Konstanten definiert:
Constant
Original:
Constant
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 Explanation
app
versuchen Ende Strom vor jedem Schreibvorgang
Original:
seek to the end of stream before each write
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binary
Öffnen Sie im Binär-Modus
Original:
open in binary mode
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in
zum Lesen öffnen
Original:
open for reading
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out
zum Schreiben geöffnet
Original:
open for writing
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trunc
Verwerfen der Inhalt des Stroms beim Öffnen
Original:
discard the contents of the stream when opening
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ate
versuchen Ende Stromes unmittelbar nach geöffnet
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
versuchen Ende Strom vor jedem Schreibvorgang
Original:
seek to the end of stream before each write
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binary
Öffnen Sie im Binär-Modus
Original:
open in binary mode
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in
zum Lesen öffnen
Original:
open for reading
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out
zum Schreiben geöffnet
Original:
open for writing
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trunc
Verwerfen der Inhalt des Stroms beim Öffnen
Original:
discard the contents of the stream when opening
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ate
versuchen Ende Stromes unmittelbar nach geöffnet
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seek to the end of stream immediately after open
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Rückgabewert

(None)
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(none)
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Beispiel

This section is incomplete
Reason: no example

Siehe auch