Namespace
Varianti

std::cout, std::wcout

Da cppreference.com.
< cpp‎ | io

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File 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(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ostream
Gli oggetti globali
Original:
Global objects
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cout
wcout
Membri funzioni
Original:
Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Ingresso formattato
Original:
Formatted input
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basic_ostream::operator<<
Ingresso non formattato
Original:
Unformatted input
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basic_ostream::put
basic_ostream::write
Posizionamento
Original:
Positioning
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basic_ostream::tellp
basic_ostream::seekp
Varie
Original:
Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Membri classi
Original:
Member classes
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basic_ostream::sentry
Non membri funzioni
Original:
Non-member functions
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operator<<(std::basic_ostream)
 
Defined in header <iostream>
extern std::ostream cout;
(1)
extern std::wostream wcout;
(2)
Gli oggetti globali std::cout e std::wcout uscita di controllo ad un buffer del flusso di attuazione tipo definito (derivato da std::streambuf), associata allo standard output stream C stdout.
Original:
The global objects std::cout and std::wcout control output to a stream buffer of implementation-defined type (derived from std::streambuf), associated with the standard C output stream stdout.
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Questi oggetti sono garantiti per essere costruito prima del primo costruttore di un oggetto statico viene chiamato e sono garantiti per sopravvivere distruttore ultimo di un oggetto statico, in modo che sia sempre possibile scrivere std::cout nel codice utente.
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::cout in user code.
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A meno che sync_with_stdio(false) è stato rilasciato, è sicuro per accedere a questi oggetti contemporaneamente da più thread sia per l'output formattato e non formattati.
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.
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Una volta inizializzato, std::cout è pareggio () 'd per std::cin e std::wcout è cravatta ()' d per std::wcin, il che significa che ogni operazione di ingresso std::cin esegue std::cout.flush() (tramite il costruttore di std::basic_istream::sentry).
Original:
Once initialized, std::cout is tie()'d to std::cin and std::wcout is tie()'d to std::wcin, meaning that any input operation on std::cin executes std::cout.flush() (via std::basic_istream::sentry's constructor).
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Una volta inizializzato, std::cout è anche legare () 'd per std::cerr e std::wcout è pareggio ()' d per std::wcerr,, il che significa che qualsiasi operazione di uscita sul std::cerr esegue std::cout.flush() (tramite il costruttore di std::basic_ostream::sentry) (dal C++11)
Original:
Once initialized, std::cout is also tie()'d to std::cerr and std::wcout is tie()'d to std::wcerr,, meaning that any output operation on std::cerr executes std::cout.flush() (via std::basic_ostream::sentry's constructor) (dal C++11)
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[modifica] Esempio

#include <iostream>
struct Foo {
    int n;
    Foo() {
       std::cout << "static constructor\n";
    }
    ~Foo() {
       std::cout << "static destructor\n";
    }
};
Foo f; // static object
int main()
{
    std::cout << "main function\n";
}

Output:

static constructor
main function
static destructor

[modifica] Vedi anche

inizializza oggetti stream standard
Original:
initializes standard stream objects
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(membro pubblico of std::ios_base classe) [edit]
scrive allo standard stderr
(oggetto globale) flusso di errore C
Original:
writes to the standard C error stream stderr
(oggetto globale)
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[edit]
cout
wcout
scrive nel flusso di output standard di stdout
(oggetto globale) C
Original:
writes to the standard C output stream stdout
(oggetto globale)
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[edit]