std::ios_base::sync_with_stdio

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Ingresso / libreria di output

I / O manipolatori

C-style I / O

Buffer 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 (deprecato)

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.

Astrazioni 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

File 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 (deprecato)

ostrstream (deprecato)

strstream (deprecato)

Tipi 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

Errore categoria interfaccia 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::ios_base

Membri funzioni 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.

ios_base::ios_base

ios_base::~ios_base

Formattazione Original: Formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base::flags

ios_base::setf

ios_base::unsetf

ios_base::precision

ios_base::width

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ios_base::imbue

ios_base::getloc

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ios_base::xalloc

ios_base::iword

ios_base::pword

Varie Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base::register_callback

ios_base::sync_with_stdio

Membri classi 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.

ios_base::failure

ios_base::Init

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ios_base::openmode

ios_base::fmtflags

ios_base::iostate

ios_base::seekdir

ios_base::event

ios_base::event_callback

 

staticbool sync_with_stdio(bool sync =true);

Sets whether the standard std::cin, std::cout, std::cerr, std::clog, std::wcin, std::wcout, std::wcerr and std::wclog C++ streams are synchronized to the standard stdin, stdout, stderr and stdlog C streams after each input/output operation.

For a standard stream str, synchronized with the C stream f, the following pairs of functions have identical effect:

1)std::fputc(f, c) and str.rdbuf()->sputc(c)

2)std::fgetc(f) and str.rdbuf()->sbumpc(c)

3)std::ungetc(c, f) and str.rdbuf()->sputbackc(c) In practice, this means that the C++ and the C streams use the same buffer, and therefore, can be mixed freely. In addition, synchronized C++ streams are guaranteed to be thread-safe (individual characters output from multiple threads may interleave, but no data races occur)

If the synchronization is turned off, the C++ standard streams are allowed to buffer their I/O independently, which may be considerably faster in some cases.

By default, all eight standard C++ streams are synchronized with their respective C streams.

It is implementation-defined if this function has any effect if called after some I/O occurred on the standard stream.

Parametri

sync

-

the new synchronization setting

Valore di ritorno

synchronization state before the call to the function

Esempio

#include <iostream>#include <cstdio>int main(){std::cout.sync_with_stdio(false);std::cout<<"a\n";std::printf("b\n");std::cout<<"c\n";}

Output:

b a c

Vedi anche

cout wcout	scrive nel flusso di output standard di stdout (oggetto globale) C Original: writes to the standard C output stream stdout (oggetto globale) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
cerr wcerr	scrive nel flusso di errore standard di C stderr, unbuffered (oggetto globale) Original: writes to the standard C error stream stderr, unbuffered (oggetto globale) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
clog wclog	scrive allo standard stderr (oggetto globale) flusso di errore C Original: writes to the standard C error stream stderr (oggetto globale) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.