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std::basic_ostream::put

Da cppreference.com.
< cpp‎ | io‎ | basic ostream

 
 
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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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)
 
basic_ostream& put( char_type ch );
Scrive ch carattere nel flusso di output.
Original:
Writes character ch to the output stream.
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Questa funzione è una funzione di output non formattato: è avviare l'esecuzione con la costruzione di un oggetto di tipo sentry, che svuota il buffer di uscita tie()'d, se necessario, e controlla gli errori del flusso. Dopo la costruzione, se i rendimenti sentinella oggetto false, la funzione restituisce senza tentare alcun output. Se viene generata un'eccezione durante l'uscita, poi ios :: badbit è impostato (l'eccezione è soppressa a meno exceptions()&badbit) != 0, nel qual caso viene rilanciata)
Original:
This function is an unformatted output function: it begin execution by constructing an object of type sentry, which flushes the tie()'d output buffers if necessary and checks the stream errors. After construction, if the sentry object returns false, the function returns without attempting any output. If an exception is thrown during output, then ios::badbit is set (the exception is suppressed unless exceptions()&badbit) != 0, in which case it is rethrown)
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Indice

[modifica] Parametri

ch -
carattere da scrivere
Original:
character to write
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[modifica] Valore di ritorno

*this

[modifica] Note

formattato
Original:
This function is not overloaded for the types signed char or unsigned char, unlike the formatted
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A differenza delle funzioni di output formattato, questa funzione non viene impostato il failbit se l'uscita non riesce.
Original:
Unlike formatted output functions, this function does not set the failbit if the output fails.
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[modifica] Esempio

#include <fstream>
#include <iostream>
int main()
{
    std::cout.put('a'); // normal usage
    std::cout.put('\n');
 
    std::ofstream s("/does/not/exist/");
    s.clear(); // pretend the stream is good
    std::cout << "Unformatted output: ";
    s.put('c'); // this will set badbit, but not failbit
    std::cout << " fail=" << bool(s.rdstate() & s.failbit);
    std::cout << " bad=" << s.bad() << '\n';
    s.clear();
    std::cout << "Formatted output:   ";
    s << 'c'; // this will set badbit and failbit
    std::cout << " fail=" << bool(s.rdstate() & s.failbit);
    std::cout << " bad=" << s.bad() << '\n';
}

Output:

a
Unformatted output:  fail=0 bad=1
Formatted output:    fail=1 bad=1

[modifica] Vedi anche

inserisce i dati carattere
Original:
inserts character data
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(funzione) [edit]
blocchi inserti di caratteri
Original:
inserts blocks of characters
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(membro pubblico funzione) [edit]