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std::basic_ifstream

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C++
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(veraltet)
Streams
Original:
Streams
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Abstraktionen
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-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(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
Original:
Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ifstream
Member-Funktionen
Original:
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
Original:
File operations
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basic_ifstream::is_open
basic_ifstream::open
basic_ifstream::close
Non-Member-Funktionen
Original:
Non-member functions
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basic_ifstream::swap(std::basic_ifstream)(C++11)
 
definiert in Header <fstream>
template<

    class CharT,
    class Traits = std::char_traits<CharT>

> class basic_ifstream : public basic_istream<CharT, Traits>
Das Klassen-Template basic_ifstream implementiert Hochpegeleingang Operationen auf dateibasierte Streams. Es lässt sich eine Datei-basierte streambuffer (std::basic_filebuf) mit dem High-Level-Schnittstelle (std::basic_istream) .
Original:
The class template basic_ifstream implements high-level input operations on file based streams. It interfaces a file-based streambuffer (std::basic_filebuf) with the high-level interface of (std::basic_istream).
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Eine typische Implementierung std::basic_ifstream hält nur ein nicht-abgeleiteten Daten Mitglied: eine Instanz std::basic_filebuf<CharT, Traits> .
Original:
A typical implementation of std::basic_ifstream holds only one non-derived data member: an instance of std::basic_filebuf<CharT, Traits>.
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cpp/io/ios basecpp/io/basic ioscpp/io/basic istreamstd-basic ifstream-inheritance.svg
Über dieses Bild

Inheritance diagram

Zwei Spezialisierungen für gemeinsame Charakter-Typen sind ebenfalls definiert:
Original:
Two specializations for common character types are also defined:
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definiert in Header <fstream>
Type
Original:
Type
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 Definition
ifstream basic_ifstream<char>
wifstream basic_ifstream<wchar_t>

Inhaltsverzeichnis

[Bearbeiten] Mitglied Typen

Mitglied Typ
Original:
Member type
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 Definition
char_type CharT[edit]
traits_type Traits[edit]
int_type Traits::int_type[edit]
pos_type Traits::pos_type[edit]
off_type Traits::off_type[edit]

[Bearbeiten] Member-Funktionen
baut die Datei-Stream
Original:
constructs the file stream
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(öffentliche Elementfunktion) [edit]
(destructor)
[virtuell] (implizit deklariert)
 destructs the basic_ifstream and the associated buffer, closes the file
(virtuellen öffentlichen Member-Funktion) [edit]
(C++11)
verschiebt die Datei-Stream
Original:
moves the file stream
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(öffentliche Elementfunktion) [edit]
(C++11)
Swaps zwei Datei-Streams
Original:
swaps two file streams
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(öffentliche Elementfunktion) [edit]
liefert die zugrunde liegenden Rohdaten-Device-Objekt
Original:
returns the underlying raw file device object
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(öffentliche Elementfunktion) [edit]
Datei-Operationen
Original:
File operations
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prüft, ob der Stream eine zugehörige Datei hat
Original:
checks if the stream has an associated file
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(öffentliche Elementfunktion) [edit]
öffnet eine Datei und ordnet sie mit dem Strom
Original:
opens a file and associates it with the stream
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(öffentliche Elementfunktion) [edit]
schließt die zugehörige Datei
Original:
closes the associated file
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(öffentliche Elementfunktion) [edit]

[Bearbeiten] Non-Member-Funktionen

(C++11)
spezialisiert die std::swap Algorithmus
Original:
specializes the std::swap algorithm
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(Funktions-Template) [edit]


Inherited from std::basic_istream

Member functions

}
Formatierte Eingabe
Original:
Formatted input
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Extrakte formatierte Daten
Original:
extracts formatted data
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(öffentliche Elementfunktion of std::basic_istream) [edit]
Unformatierte Eingabe
Original:
Unformatted input
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 Extrahiere Zeichen
(öffentliche Elementfunktion of std::basic_istream) [edit]
liest das nächste Zeichen ohne es zu extrahieren
Original:
reads the next character without extracting it
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(öffentliche Elementfunktion of std::basic_istream) [edit]
unextracts ein Zeichen
Original:
unextracts a character
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(öffentliche Elementfunktion of std::basic_istream) [edit]
setzt Zeichen in Input-Stream
Original:
puts character into input stream
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(öffentliche Elementfunktion of std::basic_istream) [edit]
Extrakte Zeichen, bis die gegebene Zeichen gefunden wird
Original:
extracts characters until the given character is found
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(öffentliche Elementfunktion of std::basic_istream) [edit]
Extrakte aus und verwirft Zeichen, bis die gegebene Zeichen gefunden wird
Original:
extracts and discards characters until the given character is found
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(öffentliche Elementfunktion of std::basic_istream) [edit]
extrahiert Blöcken von Zeichen
Original:
extracts blocks of characters
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(öffentliche Elementfunktion of std::basic_istream) [edit]
extrahiert bereits verfügbaren Blöcke von Zeichen
Original:
extracts already available blocks of characters
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(öffentliche Elementfunktion of std::basic_istream) [edit]
gibt die Anzahl der Zeichen, die letzten unformatierte Eingabe-Operation extrahiert
Original:
returns number of characters extracted by last unformatted input operation
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(öffentliche Elementfunktion of std::basic_istream) [edit]
Positionierung
Original:
Positioning
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liefert den Eingang Stellungsanzeige
Original:
returns the input position indicator
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(öffentliche Elementfunktion of std::basic_istream) [edit]
sets the input position indicator
(öffentliche Elementfunktion of std::basic_istream) [edit]
Verschiedenes
Original:
Miscellaneous
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synchronisiert mit dem zugrunde liegenden Speicher
Original:
synchronizes with the underlying storage device
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(öffentliche Elementfunktion of std::basic_istream) [edit]

Member classes

 implements basic logic for preparation of the stream for input operations
(öffentlichen Member der Klasse of std::basic_istream) [edit]


Inherited from std::basic_ios

Member types

Mitglied Typ
Original:
Member type
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 Definition
char_type CharT
traits_type Traits
int_type Traits::int_type
pos_type Traits::pos_type
off_type Traits::off_type
}
Funktionen des Staates
Original:
State functions
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prüft, ob keine Fehler aufgetreten, dh I / O-Operationen zur Verfügung stehen
Original:
checks if no error has occurred i.e. I/O operations are available
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(öffentliche Elementfunktion of std::basic_ios) [edit]
prüft, ob am Ende der Datei erreicht wurde
Original:
checks if end-of-file has been reached
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(öffentliche Elementfunktion of std::basic_ios) [edit]
prüft, ob ein behebbarer Fehler aufgetreten
Original:
checks if a recoverable error has occurred
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(öffentliche Elementfunktion of std::basic_ios) [edit]
prüft, ob ein nicht behebbarer Fehler aufgetreten ist
Original:
checks if a non-recoverable error has occurred
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(öffentliche Elementfunktion of std::basic_ios) [edit]
prüft, ob ein Fehler aufgetreten ist (Synonym fail())
Original:
checks if an error has occurred (synonym of fail())
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(öffentliche Elementfunktion of std::basic_ios) [edit]
(bis C + +11)
(seit C++11)
überprüft, ob kein Fehler aufgetreten ist (Synonym !fail())
Original:
checks if no error has occurred (synonym of !fail())
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(öffentliche Elementfunktion of std::basic_ios) [edit]
gibt Statusflaggen
(öffentliche Elementfunktion of std::basic_ios) [edit]
setzt Staatsflaggen
Original:
sets state flags
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(öffentliche Elementfunktion of std::basic_ios) [edit]
löscht Fehler und eof Fahnen
Original:
clears error and eof flags
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(öffentliche Elementfunktion of std::basic_ios) [edit]
Formatierung
Original:
Formatting
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Kopien Formatierungsinformationen
Original:
copies formatting information
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(öffentliche Elementfunktion of std::basic_ios) [edit]
verwaltet die Füllzeichen
Original:
manages the fill character
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(öffentliche Elementfunktion of std::basic_ios) [edit]
Verschiedenes
Original:
Miscellaneous
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 manages exception mask
(öffentliche Elementfunktion of std::basic_ios) [edit]
Setzt die Locale
Original:
sets the locale
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(öffentliche Elementfunktion of std::basic_ios) [edit]
verwaltet verbundenen Strom-Puffer
Original:
manages associated stream buffer
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(öffentliche Elementfunktion of std::basic_ios) [edit]
verwaltet gebunden Stream
Original:
manages tied stream
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(öffentliche Elementfunktion of std::basic_ios) [edit]
verengt Zeichen
Original:
narrows characters
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(öffentliche Elementfunktion of std::basic_ios) [edit]
widens characters
(öffentliche Elementfunktion of std::basic_ios) [edit]

Inherited from std::ios_base

Member functions

Formatierung
Original:
Formatting
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verwaltet Format Fahnen
Original:
manages format flags
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(öffentliche Elementfunktion of std::ios_base) [edit]
setzt bestimmten Format Flagge
Original:
sets specific format flag
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(öffentliche Elementfunktion of std::ios_base) [edit]
clears specific format flag
(öffentliche Elementfunktion of std::ios_base) [edit]
verwaltet Nachkommastellen von Fließkomma-Operationen
Original:
manages decimal precision of floating point operations
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(öffentliche Elementfunktion of std::ios_base) [edit]
manages field width
(öffentliche Elementfunktion of std::ios_base) [edit]
Locales
Original:
Locales
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setzt locale
Original:
sets locale
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(öffentliche Elementfunktion of std::ios_base) [edit]
kehrt momentanen Locale
Original:
returns current locale
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(öffentliche Elementfunktion of std::ios_base) [edit]
Interne erweiterbare Array
Original:
Internal extensible array
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[statisch]
kehrt ein Programm-weit eindeutige Zahl, die sicher als Index PWord () und iword () verwenden
Original:
returns a program-wide unique integer that is safe to use as index to pword() and iword()
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(public static Elementfunktion of std::ios_base) [edit]
die Größe der privaten Lagerhaltung bei Bedarf und Zugang zum long Element am angegebenen Index
Original:
resizes the private storage if necessary and access to the long element at the given index
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(öffentliche Elementfunktion of std::ios_base) [edit]
die Größe der privaten Lagerhaltung bei Bedarf und Zugang zum void* Element am angegebenen Index
Original:
resizes the private storage if necessary and access to the void* element at the given index
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(öffentliche Elementfunktion of std::ios_base) [edit]
Verschiedenes
Original:
Miscellaneous
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 registers event callback function
(öffentliche Elementfunktion of std::ios_base) [edit]
[statisch]
legt fest, ob C + + und C IO Libraries interoperabel sind
Original:
sets whether C++ and C IO libraries are interoperable
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(public static Elementfunktion of std::ios_base) [edit]
Mitglied Klassen
Original:
Member classes
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Stream Ausnahme
Original:
stream exception
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(öffentlichen Member der Klasse of std::ios_base) [edit]
initialisiert Standard-Stream-Objekten
Original:
initializes standard stream objects
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(öffentlichen Member der Klasse of std::ios_base) [edit]

Mitglied Typen und Konstanten
Original:
Member types and constants
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Type
Original:
Type
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 Explanation
Stream offenen Modus-Typ

Die folgenden Konstanten sind ebenfalls definiert:

Constant
Original:
Constant
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 Explanation[edit]
app
versuchen Ende Strom vor jedem Schreibvorgang
Original:
seek to the end of stream before each write
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[edit]
binary
Öffnen Sie im Binär-Modus
Original:
open in binary mode
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[edit]
in
zum Lesen öffnen
Original:
open for reading
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[edit]
out
zum Schreiben geöffnet
Original:
open for writing
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[edit]
trunc
Verwerfen der Inhalt des Stroms beim Öffnen
Original:
discard the contents of the stream when opening
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[edit]
ate
versuchen Ende Stromes unmittelbar nach geöffnet
Original:
seek to the end of stream immediately after open
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[edit]
Original:
stream open mode type

The following constants are also defined:

Constant
Original:
Constant
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 Explanation[edit]
app
versuchen Ende Strom vor jedem Schreibvorgang
Original:
seek to the end of stream before each write
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[edit]
binary
Öffnen Sie im Binär-Modus
Original:
open in binary mode
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[edit]
in
zum Lesen öffnen
Original:
open for reading
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[edit]
out
zum Schreiben geöffnet
Original:
open for writing
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[edit]
trunc
Verwerfen der Inhalt des Stroms beim Öffnen
Original:
discard the contents of the stream when opening
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[edit]
ate
versuchen Ende Stromes unmittelbar nach geöffnet
Original:
seek to the end of stream immediately after open
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[edit]
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(typedef) [edit]
Formatierung flags Typ

Die folgenden Konstanten sind ebenfalls definiert:

Constant
Original:
Constant
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 Explanation[edit]
dec
Verwenden Dezimalbasis für Integer-I / O
Original:
use decimal base for integer I/O
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[edit]
oct
oktale Basis für integer I / O
Original:
use octal base for integer I/O
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[edit]
hex
verwenden hexadezimale Basis für integer I / O
Original:
use hexadecimal base for integer I/O
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[edit]
basefield
dec|oct|hex|0. Nützlich für Maskierung Operationen
Original:
dec|oct|hex|0. Useful for masking operations
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[edit]
left
linken Einstellung (fügt Füllzeichen auf der rechten Seite)
Original:
left adjustment (adds fill characters to the right)
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[edit]
right
richtige Einstellung (fügt Füllzeichen auf der linken Seite)
Original:
right adjustment (adds fill characters to the left)
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[edit]
internal
interne Justierung (fügt Füllzeichen auf die interne bestimmten Punkt)
Original:
internal adjustment (adds fill characters to the internal designated point)
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[edit]
adjustfield
left|right|internal. Nützlich für Maskierung Operationen
Original:
left|right|internal. Useful for masking operations
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[edit]
scientific
erzeugen Gleitkommatypen wissenschaftlicher Notation oder Hex-Notation, wenn mit festen kombiniert
Original:
generate floating point types using scientific notation, or hex notation if combined with fixed
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[edit]
fixed
erzeugen Gleitkommatypen mit festen Notation oder Hex-Notation, wenn sie mit wissenschaftlichen kombiniert
Original:
generate floating point types using fixed notation, or hex notation if combined with scientific
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[edit]
floatfield
scientific|fixed|(scientific|fixed)|0. Nützlich für Maskierung Operationen
Original:
scientific|fixed|(scientific|fixed)|0. Useful for masking operations
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[edit]
boolalpha
einfügen und extrahieren bool Art im alphanumerischen Format
Original:
insert and extract bool type in alphanumeric format
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[edit]
showbase
erzeugen ein Präfix die numerische Basis für Integer-Leistung erfordern die Währung Indikator im monetären I / O
Original:
generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O
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[edit]
showpoint
erzeugen einen Dezimalpunkt Charakter bedingungslos für Fließkommazahl ausgegeben
Original:
generate a decimal-point character unconditionally for floating-point number output
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[edit]
showpos
erzeugen eine + Zeichen für nicht-negative numerische Ausgabe
Original:
generate a + character for non-negative numeric output
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[edit]
skipws
überspringen führenden Leerzeichen vor bestimmten Input Operationen
Original:
skip leading whitespace before certain input operations
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[edit]
unitbuf
Spülen Sie die Ausgabe nach jedem Ausgabe-Operation
Original:
flush the output after each output operation
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[edit]
uppercase
ersetzen bestimmte Kleinbuchstaben mit ihren uppercase
equivalents in bestimmten Ausgang Ausgang Operationen
Original:
replace certain lowercase letters with their uppercase
equivalents in certain output output operations
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[edit]
Original:
formatting flags type

The following constants are also defined:

Constant
Original:
Constant
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 Explanation[edit]
dec
Verwenden Dezimalbasis für Integer-I / O
Original:
use decimal base for integer I/O
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[edit]
oct
oktale Basis für integer I / O
Original:
use octal base for integer I/O
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[edit]
hex
verwenden hexadezimale Basis für integer I / O
Original:
use hexadecimal base for integer I/O
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[edit]
basefield
dec|oct|hex|0. Nützlich für Maskierung Operationen
Original:
dec|oct|hex|0. Useful for masking operations
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[edit]
left
linken Einstellung (fügt Füllzeichen auf der rechten Seite)
Original:
left adjustment (adds fill characters to the right)
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[edit]
right
richtige Einstellung (fügt Füllzeichen auf der linken Seite)
Original:
right adjustment (adds fill characters to the left)
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[edit]
internal
interne Justierung (fügt Füllzeichen auf die interne bestimmten Punkt)
Original:
internal adjustment (adds fill characters to the internal designated point)
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[edit]
adjustfield
left|right|internal. Nützlich für Maskierung Operationen
Original:
left|right|internal. Useful for masking operations
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[edit]
scientific
erzeugen Gleitkommatypen wissenschaftlicher Notation oder Hex-Notation, wenn mit festen kombiniert
Original:
generate floating point types using scientific notation, or hex notation if combined with fixed
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[edit]
fixed
erzeugen Gleitkommatypen mit festen Notation oder Hex-Notation, wenn sie mit wissenschaftlichen kombiniert
Original:
generate floating point types using fixed notation, or hex notation if combined with scientific
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[edit]
floatfield
scientific|fixed|(scientific|fixed)|0. Nützlich für Maskierung Operationen
Original:
scientific|fixed|(scientific|fixed)|0. Useful for masking operations
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[edit]
boolalpha
einfügen und extrahieren bool Art im alphanumerischen Format
Original:
insert and extract bool type in alphanumeric format
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You can help to correct and verify the translation. Click here for instructions.
[edit]
showbase
erzeugen ein Präfix die numerische Basis für Integer-Leistung erfordern die Währung Indikator im monetären I / O
Original:
generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
[edit]
showpoint
erzeugen einen Dezimalpunkt Charakter bedingungslos für Fließkommazahl ausgegeben
Original:
generate a decimal-point character unconditionally for floating-point number output
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
[edit]
showpos
erzeugen eine + Zeichen für nicht-negative numerische Ausgabe
Original:
generate a + character for non-negative numeric output
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
[edit]
skipws
überspringen führenden Leerzeichen vor bestimmten Input Operationen
Original:
skip leading whitespace before certain input operations
The text has been machine-translated via Google Translate.
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[edit]
unitbuf
Spülen Sie die Ausgabe nach jedem Ausgabe-Operation
Original:
flush the output after each output operation
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[edit]
uppercase
ersetzen bestimmte Kleinbuchstaben mit ihren uppercase
equivalents in bestimmten Ausgang Ausgang Operationen
Original:
replace certain lowercase letters with their uppercase
equivalents in certain output output operations
The text has been machine-translated via Google Translate.
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[edit]
The text has been machine-translated via Google Translate.
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(typedef) [edit]
Stand der Stream-Typ

Die folgenden Konstanten sind ebenfalls definiert:

Constant
Original:
Constant
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 Explanation[edit]
goodbit
kein Fehler
Original:
no error
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[edit]
badbit
uneinbringlich Stream Fehler
Original:
irrecoverable stream error
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[edit]
failbit
Input / Output-Vorgang ist fehlgeschlagen (Formatierung oder Extraktion Fehler)
Original:
input/output operation failed (formatting or extraction error)
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[edit]
eofbit
assoziiert Eingabesequenz hat end-of-Datei erreicht
Original:
associated input sequence has reached end-of-file
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[edit]
Original:
state of the stream type

The following constants are also defined:

Constant
Original:
Constant
The text has been machine-translated via Google Translate.
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 Explanation[edit]
goodbit
kein Fehler
Original:
no error
The text has been machine-translated via Google Translate.
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[edit]
badbit
uneinbringlich Stream Fehler
Original:
irrecoverable stream error
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[edit]
failbit
Input / Output-Vorgang ist fehlgeschlagen (Formatierung oder Extraktion Fehler)
Original:
input/output operation failed (formatting or extraction error)
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[edit]
eofbit
assoziiert Eingabesequenz hat end-of-Datei erreicht
Original:
associated input sequence has reached end-of-file
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[edit]
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(typedef) [edit]
seeking direction type

The following constants are also defined:

Constant
Original:
Constant
The text has been machine-translated via Google Translate.
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 Explanation[edit]
beg
der Beginn einer Stream
Original:
the beginning of a stream
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[edit]
end
das Ende eines Streams
Original:
the ending of a stream
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[edit]
cur
die aktuelle Position des Stroms Stellungsanzeige
Original:
the current position of stream position indicator
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[edit]

(typedef) [edit]
legt Event-Typ
Original:
specifies event type
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(enum) [edit]
Callback-Funktion aus
Original:
callback function type
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(typedef) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/io/basic_ifstream&oldid=31677“