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std::feof

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C-style I / O
Tampons
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf (obsolète)
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basic_ofstream
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istrstream (obsolète)
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streamoff
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fpos
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iostream_category (C++11)
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clearerr
feof
ferror
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remove
rename
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Defined in header <cstdio>
int feof( FILE* stream );
Vérifie si la fin du flux de fichier donné a été atteint .
Original:
Checks if the end of the given file stream has been reached.
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Sommaire

[modifier] Paramètres

stream -
le flux de fichier à vérifier
Original:
the file stream to check
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[modifier] Retourne la valeur

Valeur différente de zéro si la fin du flux a été atteinte, sinon 0 .
Original:
Nonzero value if the end of the stream has been reached, otherwise 0.
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[modifier] Notes

Cette fonction signale que l'état courant tel que rapporté par la plus récente opération E / S, il n'examine pas la source de données associée. Par exemple, si la plus récente d'E / S a été un std::fgetc, qui a retourné le dernier octet d'un fichier, std::feof renvoie une valeur non nulle. Le std::fgetc suivante échoue et modifie l'état de flux de fin-de-fichier. C'est alors seulement std::feof retourne zéro .
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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En utilisation normale, le traitement des flux d'entrée s'arrête sur une erreur; feof et std::ferrror sont ensuite utilisés pour distinguer entre les différentes conditions d'erreur .
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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[modifier] Exemple

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


[modifier] Voir aussi

vérifie si fin de fichier a été atteinte
Original:
checks if end-of-file has been reached
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(fonction membre publique de std::basic_ios) [edit]
efface les erreurs
Original:
clears errors
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(fonction) [edit]
affiche une chaîne de caractères correspondant de l'erreur de courant à stderr
Original:
displays a character string corresponding of the current error to stderr
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(fonction) [edit]
chèques pour une erreur de fichier
Original:
checks for a file error
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(fonction) [edit]