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std::fwrite

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De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
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Streams
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Abstrações
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cordas I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
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Array I/O
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istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
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Types
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streamoff
streamsize
fpos
Interface de categoria de erro
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
C estilo de I / O
Funções
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Functions
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Arquivo de acesso
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File access
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Directa de entrada / saída
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Direct input/output
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fread
fwrite
Não formatado entrada / saída
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Unformatted input/output
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Formatado de entrada / saída
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Formatted input/output
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Arquivo de posicionamento
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File positioning
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ftell
fgetpos
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rewind
De tratamento de erros
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Error handling
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clearerr
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perror
Operações em arquivos
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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 os objetos não são TriviallyCopyable, o comportamento é indefinido.
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If the objects are not TriviallyCopyable, the behavior is undefined.
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Se ocorrer um erro, o valor resultante do indicador de posição de arquivo do fluxo é
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If an error occurs, the resulting value of the file position indicator for the stream is
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indeterminate.

Índice

[editar] Parâmetros

buffer -
ponteiro para o objeto primeiro objeto na matriz a ser escrito
Original:
pointer to the first object object in the array to be written
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size -
tamanho de cada objeto
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size of each object
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count -
o número de objetos a serem escritos
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the number of the objects to be written
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[editar] Valor de retorno

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

Se size ou count é zero, fwrite retorna zero e não executa nenhuma outra ação.
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If size or count is zero, fwrite returns zero and performs no other action.
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[editar] Exemplo

[editar] Veja também

impressões saída formatada para stdout, um fluxo de arquivo ou um tampão
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prints formatted output to stdout, a file stream or a buffer
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(função) [edit]
escreve uma seqüência de caracteres para um fluxo de arquivo
Original:
writes a character string to a file stream
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(função) [edit]
lê um arquivo
Original:
reads from a file
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(função) [edit]
C documentation for fwrite