std::basic_filebuf::showmanyc
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< cpp | io | basic filebuf
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| protected: virtual std::streamsize showmanyc() |
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Si elles sont appliquées, retourne le nombre de caractères restants pour lire le fichier .
Original:
If implemented, returns the number of characters left to read from the file.
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Sommaire |
[modifier] Paramètres
(Aucun)
Original:
(none)
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[modifier] Retourne la valeur
Le nombre de caractères disponibles pour la lecture du fichier, ou si -1 la fin du fichier a été atteint .
Original:
The number of characters available for reading from the file, or -1 if the end of file was reached.
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[modifier] Notes
Cette fonction est optionnelle. Si ce n'est pas mis en œuvre, cette fonction retourne 0 (depuis la version de base std::basic_streambuf::showmanyc classe est appelée)
Original:
This function is optional. If not implemented, this function returns 0 (since the base class version std::basic_streambuf::showmanyc gets called)
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Que ce soit ou non mis en œuvre, cette fonction est normalement appelé par std::basic_streambuf::in_avail si la zone est vide .. get
Original:
Whether implemented or not, this function is normally called by std::basic_streambuf::in_avail if the get area is empty.
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[modifier] Exemple
test de mise en œuvre pour voir si showmanyc () est mis en œuvre pour filebuf
Original:
implementation test to see if showmanyc() is implemented for filebuf
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#include <fstream> #include <iostream> struct mybuf : std::filebuf { using std::filebuf::showmanyc; }; int main() { mybuf fin; fin.open("test.in", std::ios_base::in); std::cout << "showmanyc() returns " << fin.showmanyc() << '\n'; }
Résultat :
showmanyc() returns 6626
[modifier] Voir aussi
| obtient le nombre de caractères disponibles immédiatement dans la zone d'obtention Original: obtains the number of characters immediately available in the get area The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique de std::basic_streambuf)
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| extrait des blocs déjà disponibles de caractères Original: extracts already available blocks of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique de std::basic_istream)
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