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    fopen

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    C
     
    File input/output
    Funktionen
    Original:
    Functions
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    Dateizugriff
    Original:
    File access
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    Direkte Eingabe / Ausgabe
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    Direct input/output
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    fread
    fwrite
    Unformatierte Eingang / Ausgang
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    Unformatted input/output
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    Formatierte Eingabe / Ausgabe
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    Formatted input/output
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    Datei Positionierung
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    File positioning
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    ftell
    fgetpos
    fseek
    fsetpos
    rewind
    Fehlerbehandlung
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    Error handling
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    clearerr
    feof
    ferror
    perror
    Operationen auf Dateien
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    Operations on files
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    remove
    rename
    tmpfile
    tmpnam
     
    <tbody> </tbody>
    definiert in Header <stdio.h>
    FILE *fopen( const char *filename, const char *mode );

    Öffnet die Datei filename und gibt den Daten-Stream, der mit dieser Datei verbunden ist, zurück. mode wird verwendet, um den Zugriff auf den Dateien-Modus fest zu legen.

    Parameter

    filename - dateiname, um den Datei-Stream ein zu richten
    mode - null-terminierte Zeichenkette zur Bestimmung des Dateizugriffsmodus
    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.

    Rückgabewert

    Bei Erfolg wird der geöffnete Datei-Stream zurück gegeben, NULL im Fehlerfall

    Siehe auch
    schließt eine Datei
    Original:
    closes a file
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    (Funktion) [edit]
    synchronisiert einen Ausgabe-Stream mit der eigentlichen Datei
    Original:
    synchronizes an output stream with the actual file
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    (Funktion) [edit]
    Öffnen einer vorhandenen Stream mit einem anderen Namen
    Original:
    open an existing stream with a different name
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    (Funktion) [edit]
    C++ documentation for fopen