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    std::feof

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    C++
     
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    definiert in Header <cstdio>
    int feof( FILE* stream );
    Prüft, ob das Ende der angegebenen Datei-Stream erreicht wurde .
    Original:
    Checks if the end of the given file stream has been reached.
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    Inhaltsverzeichnis

    [Bearbeiten]Parameter

    stream -
    der Datei-Stream zu überprüfen
    Original:
    the file stream to check
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    [Bearbeiten]Rückgabewert

    Null-Wert, wenn das Ende des Stroms erreicht ist, andernfalls ​0​ .
    Original:
    Nonzero value if the end of the stream has been reached, otherwise ​0​.
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    [Bearbeiten]Notes

    Diese Funktion meldet nur den Strom Staat als von der jüngsten I / O-Operation berichtet, ist es nicht untersuchen die zugeordneten Datenquellen. Zum Beispiel, wenn die neueste I / O war ein std::fgetc, das das letzte Byte einer Datei zurückgeführt, kehrt std::feof ungleich Null. Der nächste std::fgetc ausfällt und ändert den Strom Staat end-of-file. Erst dann std::feof Null zurück .
    Original:
    This function only reports the stream state as reported by the most recent I/O operation, it does not examine the associated data source. For example, if the most recent I/O was a std::fgetc, which returned the last byte of a file, std::feof returns non-zero. The next std::fgetc fails and changes the stream state to end-of-file. Only then std::feof returns zero.
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    In der typischen Anwendung, stoppt Input Stream Processing bei jedem Fehler; feof und std::ferrror werden dann verwendet, um zwischen verschiedenen Fehlerbedingungen unterscheiden .
    Original:
    In typical usage, input stream processing stops on any error; feof and std::ferrror are then used to distinguish between different error conditions.
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    [Bearbeiten]Beispiel

    [edit]
    #include <cstdio>#include <cstdlib>   int main(){ FILE* fp =std::fopen("test.txt", "r");if(!fp){std::perror("File opening failed");returnEXIT_FAILURE;}   int c;// note: int, not char, required to handle EOFwhile((c =std::fgetc(fp))!=EOF){// standard C I/O file reading loopstd::putchar(c);}   if(std::ferror(fp))std::puts("I/O error when reading");elseif(std::feof(fp))std::puts("End of file reached successfully");}


    [Bearbeiten]Siehe auch

    prüft, ob am Ende der Datei erreicht wurde
    Original:
    checks if end-of-file has been reached
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    (öffentliche Elementfunktion of std::basic_ios)[edit]
    löscht Fehler
    Original:
    clears errors
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    (Funktion)[edit]
    zeigt eine Zeichenfolge entspricht der aktuellen Fehler stderr
    Original:
    displays a character string corresponding of the current error to stderr
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    (Funktion)[edit]
    Prüfungen für eine Datei Fehler
    Original:
    checks for a file error
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    (Funktion)[edit]
    C documentation for feof
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/io/c/feof&oldid=26890“
    close