Namensräume
Varianten
Aktionen

std::cerr, std::wcerr

Aus cppreference.com
< cpp‎ | io

 
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
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(veraltet)
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.
Abstraktionen
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
Datei-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
String 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
Array 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(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
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
Fehler Kategorie Schnittstelle
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_ostream
Globale Objekte
Original:
Global objects
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
cerr
wcerr
Member-Funktionen
Original:
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_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Formatierte Eingabe
Original:
Formatted input
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ostream::operator<<
Unformatierte Eingabe
Original:
Unformatted input
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ostream::put
basic_ostream::write
Positionierung
Original:
Positioning
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ostream::tellp
basic_ostream::seekp
Verschiedenes
Original:
Miscellaneous
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ostream::flush
basic_ostream::swap(C++11)
Mitglied Klassen
Original:
Member classes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
basic_ostream::sentry
Non-Member-Funktionen
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.
operator<<(std::basic_ostream)
 
Defined in header <iostream>
extern std::ostream cerr;
(1)
extern std::wostream wcerr;
(2)
Die globale Objekte std::cerr und std::wcerr Steuerausgang zu einem Strom-Puffer der Umsetzung Typs (abgeleitet von std::streambuf und std::wstreambuf bezeichnet), mit dem Standard-C Fehlerausgabe-Stream zugeordnet stderr .
Original:
The global objects std::cerr and std::wcerr control output to a stream buffer of implementation-defined type (derived from std::streambuf and std::wstreambuf, respectively), associated with the standard C error output stream stderr.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Diese Objekte sind garantiert gebaut, bevor die erste Konstruktor einer statischen Objekt aufgerufen werden, und sie werden garantiert, um die letzten Destruktor eines statischen Objekts überleben, so dass es immer möglich ist, um std::cerr im User-Code zu schreiben .
Original:
These objects are guaranteed to be constructed before the first constructor of a static object is called and they are guaranteed to outlive the last destructor of a static object, so that it is always possible to write to std::cerr in user code.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Sofern sync_with_stdio(false) ausgestellt wurde, ist es sicher den gleichzeitigen Zugriff auf diese Objekte aus mehreren Threads sowohl für formatierte und unformatierte Ausgabe .
Original:
Unless sync_with_stdio(false) has been issued, it is safe to concurrently access these objects from multiple threads for both formatted and unformatted output.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Einmal initialisiert std::cerr.flags() & unitbuf != 0 (gleich für wcerr) Bedeutung, dass alle Ausgaben, die an diese Stream-Objekte sofort an den OS gespült (via std::basic_ostream::sentry Destruktor) .
Original:
Once initialized, std::cerr.flags() & unitbuf != 0 (same for wcerr) meaning that any output sent to these stream objects is immediately flushed to the OS (via std::basic_ostream::sentry's destructor).
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Darüber hinaus bedeutet std::cerr.tie() kehrt &std::cout (gleich für wcerr und wcout), dass jede Ausgabe-Operation am std::cerr führt zunächst std::cout.flush() (via std::basic_ostream::sentry Konstruktor) (seit C++11)
Original:
In addition, std::cerr.tie() returns &std::cout (same for wcerr and wcout), meaning that any output operation on std::cerr first executes std::cout.flush() (via std::basic_ostream::sentry's constructor) (seit C++11)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[Bearbeiten] Beispiel

Ausgabe auf stderr über cerr spült die anstehende Ausgabe auf cout, während an stderr über verstopfen nicht
Original:
output to stderr via cerr flushes out the pending output on cout, while output to stderr via clog does not
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <thread>
#include <iostream>
#include <chrono>
void f()
{
    std::cout << "Output from thread...";
    std::this_thread::sleep_for(std::chrono::seconds(2));
    std::cout << "...thread calls flush()" << std::endl;
}
 
int main()
{
    std::thread t1(f);
    std::this_thread::sleep_for(std::chrono::seconds(1));
    std::clog << "This output from main is not tie()'d to cout\n";
    std::cerr << "This output is tie()'d to cout\n";
    t1.join();
}

Output:

This output from main is not tie()'d to cout
Output from thread...This output is tie()'d to cout
...thread calls flush()

[Bearbeiten] Siehe auch

initialisiert Standard-Stream-Objekten
Original:
initializes standard stream objects
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(öffentlichen Member der Klasse of std::ios_base) [edit]
schreibt der Standard-C-Fehler Stream stderr
(globales Objekt)
Original:
writes to the standard C error stream stderr
(globales Objekt)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
[edit]
schreibt der Standard-C Ausgabe-Stream stdout
(globales Objekt)
Original:
writes to the standard C output stream stdout
(globales Objekt)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
[edit]