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std::basic_ostream::write

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
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Streams
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Astrazioni
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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
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Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ostream
Gli oggetti globali
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Global objects
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Membri funzioni
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Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Ingresso formattato
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Formatted input
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basic_ostream::operator<<
Ingresso non formattato
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Unformatted input
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basic_ostream::put
basic_ostream::write
Posizionamento
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Positioning
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basic_ostream::tellp
basic_ostream::seekp
Varie
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Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Membri classi
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Member classes
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basic_ostream::sentry
Non membri funzioni
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Non-member functions
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operator<<(std::basic_ostream)
 
basic_ostream& write( const char_type* s, std::streamsize count );

Outputs characters from successive locations in the character array whose first element is pointed to by s. Characters are inserted into the output sequence until one of the following occurs:

  • exactly count characters are inserted
  • inserting into the output sequence fails (in which case setstate(badbit) is called)
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

s - pointer to the character string to write
count - number of characters to write

[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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Also, unlike the formatted output functions, this function does not set the failbit on failure.

[modifica] Eccezioni

If an exception occurs during output and exceptions()&badbit != 0, rethrows that exception.

If output fails and exceptions()&badbit != 0, throws ios_base::failure.

[modifica] Esempio

This function may be used to output object representations, i.e. binary output

#include <iostream>
int main()
{
    int n = 0x41424344;
    std::cout.write(reinterpret_cast<char*>(&n), sizeof n);
    std::cout << '\n';
}

Output:

DCBA

[modifica] Vedi anche

inserisce i dati carattere
Original:
inserts character data
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(funzione) [edit]
inserisce un carattere
Original:
inserts a character
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(membro pubblico funzione) [edit]