Espaços nominais
Variantes
Acções

fopen

Da cppreference.com
< c‎ | io

 
 
File input/output
Funções
Original:
Functions
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Arquivo de acesso
Original:
File access
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Directa de entrada / saída
Original:
Direct input/output
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fread
fwrite
Não formatado entrada / saída
Original:
Unformatted input/output
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Formatado de entrada / saída
Original:
Formatted input/output
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Arquivo de posicionamento
Original:
File positioning
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ftell
fgetpos
fseek
fsetpos
rewind
De tratamento de erros
Original:
Error handling
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clearerr
feof
ferror
perror
Operações em arquivos
Original:
Operations on files
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remove
rename
tmpfile
tmpnam
 
Defined in header <stdio.h>
FILE *fopen( const char *filename, const char *mode );
Abre um arquivo indicado por filename e retorna um fluxo de arquivo associado a esse arquivo. mode é usado para determinar o modo de acesso a arquivos.
Original:
Opens a file indicated by filename and returns a file stream associated with that file. mode is used to determine the file access mode.
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[editar] Parâmetros

filename -
Nome do arquivo para associar o fluxo de arquivo
Original:
file name to associate the file stream to
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mode -
terminada em nulo cadeia de caracteres que determina o modo de acesso ao arquivo
File access
mode string
Meaning Explanation Action if file
already exists
Action if file
does not exist
"r" read Open a file for reading read from start failure to open
"w" write Create a file for writing destroy contents create new
"a" append Append to a file write to end create new
"r+" read extended Open a file for read/write read from start error
"w+" write extended Create a file for read/write destroy contents create new
"a+" append extended Open a file for read/write write to end create new
File access mode flag "b" can optionally be specified to open a file in binary mode. This flag has effect only on Windows systems.
On the append file access modes, data is written to the end of the file regardless of the current position of the file position indicator.
Original:
null-terminated character string determining file access mode
File access
mode string
Meaning Explanation Action if file
already exists
Action if file
does not exist
"r" read Open a file for reading read from start failure to open
"w" write Create a file for writing destroy contents create new
"a" append Append to a file write to end create new
"r+" read extended Open a file for read/write read from start error
"w+" write extended Create a file for read/write destroy contents create new
"a+" append extended Open a file for read/write write to end create new
File access mode flag "b" can optionally be specified to open a file in binary mode. This flag has effect only on Windows systems.
On the append file access modes, data is written to the end of the file regardless of the current position of the file position indicator.
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[editar] Valor de retorno

Inaugurado fluxo de arquivo em caso de sucesso, NULL em caso de falha
Original:
Opened file stream on success, NULL on failure
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[editar] Veja também

fecha um arquivo
Original:
closes a file
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(função) [edit]
sincroniza um fluxo de saída com o arquivo real
Original:
synchronizes an output stream with the actual file
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(função) [edit]
abrir um córrego existente com um nome diferente
Original:
open an existing stream with a different name
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(função) [edit]