Namespace
Varianti

std::fwrite

Da cppreference.com.
< cpp‎ | io‎ | c

 
 
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
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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
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)
 
C-style I / O
Funzioni
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Functions
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Accesso ai file
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File access
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Diretta input / output
Original:
Direct input/output
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fread
fwrite
Ingresso formattato / uscita
Original:
Unformatted input/output
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Formattato di input / output
Original:
Formatted input/output
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File di posizionamento
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File positioning
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ftell
fgetpos
fseek
fsetpos
rewind
La gestione degli errori
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Error handling
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clearerr
feof
ferror
perror
Le operazioni sui file
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Operations on files
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remove
rename
tmpfile
tmpnam
 
Defined in header <cstdio>
int fwrite( const void* buffer, std::size_t size, std::size_t count, std::FILE* stream );

Writes up to count objects from the given array buffer to the output stream stream as if by reinterepreting each object as an array of unsigned char and calling std::fputc size times for each object to write those unsigned chars into stream, in order. The file position indicator for the stream is advanced by the number of characters written.

Se gli oggetti non sono TriviallyCopyable, il comportamento non è definito.
Original:
If the objects are not TriviallyCopyable, the behavior is undefined.
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Se si verifica un errore, il valore risultante dell'indicatore file di posizione per il flusso è
Original:
If an error occurs, the resulting value of the file position indicator for the stream is
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indeterminate.

Indice

[modifica] Parametri

buffer -
puntatore all'oggetto primo oggetto nella matrice da scrivere
Original:
pointer to the first object object in the array to be written
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size -
dimensione di ciascun oggetto
Original:
size of each object
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count -
il numero degli oggetti da scrivere
Original:
the number of the objects to be written
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[modifica] Valore di ritorno

Number of objects written successfully, which may be less than count if an error occurred.

Se size o count è pari a zero, fwrite restituisce zero e non esegue alcuna altra azione.
Original:
If size or count is zero, fwrite returns zero and performs no other action.
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[modifica] Esempio

[modifica] Vedi anche

stampe formattata uscita stdout, un flusso di file o di un buffer
Original:
prints formatted output to stdout, a file stream or a buffer
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(funzione) [edit]
Scrive una stringa di caratteri in un flusso di file
Original:
writes a character string to a file stream
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(funzione) [edit]
legge da un file
Original:
reads from a file
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(funzione) [edit]
C documentation for fwrite