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    std::fopen

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    <metanoindex/>

     
    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
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    String I/O
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    basic_istringstream
    basic_ostringstream
    basic_stringstream
    Array I / O
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    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)
     
    C-style I / O
    Funzioni
    Original:
    Functions
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    Accesso ai file
    Original:
    File access
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    Diretta input / output
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    Direct input/output
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    fread
    fwrite
    Ingresso formattato / uscita
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    Unformatted input/output
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    Formattato di input / output
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    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
     
    <tbody> </tbody>
    Elemento definito nell'header <cstdio>
    FILE *fopen( const char *filename, const char *mode );
    Apre un file indicato da filename e restituisce un flusso di file associato al file. mode viene utilizzato per determinare la modalità di accesso file.
    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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    Parametri

    filename -
    il nome del file per associare il flusso di file
    Original:
    file name to associate the file stream to
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    mode -
    terminazione null stringa di caratteri che determinano l'accesso in modalità file
    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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    Valore di ritorno

    Aperto flusso di file in caso di successo, NULL in caso di fallimento
    Original:
    Opened file stream on success, NULL on failure
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    Vedi anche
    chiude un file
    Original:
    closes a file
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    (funzione) [modifica]
    sincronizza un flusso di output con il file vero e proprio
    Original:
    synchronizes an output stream with the actual file
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    (funzione) [modifica]
    aprire uno stream esistente con un nome diverso
    Original:
    open an existing stream with a different name
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    (funzione) [modifica]
    C documentation for fopen