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std::basic_ostream::seekp

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< cpp‎ | io‎ | basic ostream

 
 
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_ostream
Globale Objekte
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Global objects
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Member-Funktionen
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Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Formatierte Eingabe
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Formatted input
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basic_ostream::operator<<
Unformatierte Eingabe
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Unformatted input
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basic_ostream::put
basic_ostream::write
Positionierung
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Positioning
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basic_ostream::tellp
basic_ostream::seekp
Verschiedenes
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Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Mitglied Klassen
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Member classes
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basic_ostream::sentry
Non-Member-Funktionen
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Non-member functions
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operator<<(std::basic_ostream)
 
basic_ostream& seekp( pos_type pos );
(1)
basic_ostream& seekp( off_type off, std::ios_base::seekdir dir);
(2)
Legt die Ausgangsposition Indikator für die aktuelle zugehörigen streambuf Objekt .
Original:
Sets the output position indicator of the current associated streambuf object.
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Zunächst baut eine sentry Objekt, das den Strom für Fehler und spült die tie () 'd Output-Streams prüft. (seit C++11) Danach
Original:
First, constructs a sentry object which checks the stream for errors and flushes the tie()'d output streams. (seit C++11) Afterwards,
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1)
setzt den Ausgang Stellungsanzeige um absolut (bezogen auf den Anfang der Datei) Wert pos durch Aufrufen rdbuf()->pubseekoff(pos, std::ios_base::out). Wenn der Aufruf zurückkehrt (pos_type)-1 führt setstate(failbit) .
Original:
sets the output position indicator to absolute (relative to the beginning of the file) value pos by calling rdbuf()->pubseekoff(pos, std::ios_base::out). If the call returns (pos_type)-1, executes setstate(failbit).
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2)
setzt den Ausgang Stellungsanzeige off gegenüber dir indem rdbuf()->pubseekoff(off, dir, std::ios_base::out) ausgeglichen. Meldet keine Fehler .
Original:
sets the output position indicator to offset off relative to dir by calling rdbuf()->pubseekoff(off, dir, std::ios_base::out). Does not report errors.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

pos -
Absolutposition um den Ausgang Lagemelder eingestellt .
Original:
absolute position to set the output position indicator to.
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off -
relative Position, um die Ausgabe Lagemelder eingestellt .
Original:
relative position to set the output position indicator to.
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dir -
definiert Grundposition den relativen Offset zu bewerben. Es kann eine der folgenden Konstanten sein:
Constant
Original:
Constant
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Explanation
beg
der Beginn einer Stream
Original:
the beginning of a stream
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end
das Ende eines Streams
Original:
the ending of a stream
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cur
die aktuelle Position des Stroms Stellungsanzeige
Original:
the current position of stream position indicator
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Original:
defines base position to apply the relative offset to. It can be one of the following constants:
Constant
Original:
Constant
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Explanation
beg
der Beginn einer Stream
Original:
the beginning of a stream
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end
das Ende eines Streams
Original:
the ending of a stream
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cur
die aktuelle Position des Stroms Stellungsanzeige
Original:
the current position of stream position indicator
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[Bearbeiten] Rückgabewert

*this

[Bearbeiten] Ausnahmen

1)
Kann std::ios_base::failure im Falle des Scheiterns zu werfen, wenn exceptions() & failbit != 0 .
Original:
May throw std::ios_base::failure in case of failure, if exceptions() & failbit != 0.
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2)
Nicht werfen, wenn rdbuf()->pubseekoff() wirft
Original:
Does not throw unless rdbuf()->pubseekoff() throws
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[Bearbeiten] Beispiel

#include <sstream>
#include <iostream>
 
int main()
{
    std::ostringstream os("hello, world");
    os.seekp(7);
    os << 'W';
    os.seekp(0, std::ios_base::end);
    os << '!';
    os.seekp(0);
    os << 'H';
    std::cout << os.str() << '\n';
}

Output:

Hello, World!

[Bearbeiten] Siehe auch

gibt die Ausgabe Stellungsanzeige
Original:
returns the output position indicator
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(öffentliche Elementfunktion) [edit]
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]