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    std::basic_istream::seekg

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    <metanoindex/>

     
    C++
     
    D'entrée / sortie de bibliothèque
    I / O manipulateurs
    C-style I / O
    Tampons
    Original:
    Buffers
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    basic_streambuf
    basic_filebuf
    basic_stringbuf
    strstreambuf (obsolète)
    Cours d'eau
    Original:
    Streams
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    Abstractions
    Original:
    Abstractions
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    ios_base
    basic_ios
    basic_istream
    basic_ostream
    basic_iostream
    Fichier E / O
    Original:
    File I/O
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    basic_ifstream
    basic_ofstream
    basic_fstream
    Chaîne I / O
    Original:
    String I/O
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    basic_istringstream
    basic_ostringstream
    basic_stringstream
    Tableau I / O
    Original:
    Array I/O
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    istrstream (obsolète)
    ostrstream (obsolète)
    strstream (obsolète)
    Types
    Original:
    Types
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    streamoff
    streamsize
    fpos
    Interface catégorie d'erreur
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    Error category interface
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    iostream_category (C++11)
    io_errc (C++11)
     
    std::basic_istream
    Les objets globaux
    Original:
    Global objects
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    cin
    wcin
    Les fonctions membres
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    Member functions
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    basic_istream::basic_istream
    basic_istream::~basic_istream
    basic_istream::operator= (C++11)
    Entrée formaté
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    Formatted input
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    basic_istream::operator>>
    Entrée non formaté
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    Unformatted input
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    basic_istream::get
    basic_istream::peek
    basic_istream::unget
    basic_istream::putback
    basic_istream::getline
    basic_istream::ignore
    basic_istream::read
    basic_istream::readsome
    basic_istream::gcount
    Positionnement
    Original:
    Positioning
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    basic_istream::tellg
    basic_istream::seekg
    Divers
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    Miscellaneous
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    basic_istream::sync
    basic_istream::swap (C++11)
    Classes de membres
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    Member classes
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    basic_istream::sentry
    Tiers fonctions
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    Non-member functions
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    operator>>(std::basic_istream)
     
    <tbody> </tbody>
    basic_istream& seekg( pos_type pos );
    basic_istream& seekg( off_type off, std::ios_base::seekdir dir);
    Les ensembles d'indicateurs de position d'entrée de l'objet associé streambuf courant. En cas d'échec, les appels setstate(std::ios_base::failbit) .
    Original:
    Sets input position indicator of the current associated streambuf object. In case of failure, calls setstate(std::ios_base::failbit).
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    Tout d'abord, efface eofbit (depuis C++11), puis se comporte comme UnformattedInputFunction, sauf que gcount() n'est pas affectée. Après la construction et la vérification de l'objet sentinelle,
    Original:
    First, clears eofbit (depuis C++11), then behaves as UnformattedInputFunction, except that gcount() is not affected. After constructing and checking the sentry object,
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    1)

    définit l'indicateur de position d'entrée à pos valeur absolue (par rapport au début du fichier). Plus précisément, exécute rdbuf()->pubseekpos(pos, std::ios_base::in) .
    Original:
    sets the input position indicator to absolute (relative to the beginning of the file) value pos. Specifically, executes rdbuf()->pubseekpos(pos, std::ios_base::in).
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    2)

    définit l'indicateur de position d'entrée à off position, par rapport à la position, définie par dir. Plus précisément, exécute rdbuf()->pubseekoff(off, dir, std::ios_base::in) .
    Original:
    sets the input position indicator to position off, relative to position, defined by dir. Specifically, executes rdbuf()->pubseekoff(off, dir, std::ios_base::in).
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    Paramètres

    pos -
    position absolue de mettre l'indicateur de position d'entrée à .
    Original:
    absolute position to set the input position indicator to.
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    off -
    position relative de définir l'indicateur de position d'entrée à .
    Original:
    relative position to set the input position indicator to.
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    dir -
    définit la position de base pour appliquer le décalage par rapport à. Elle peut être une des constantes suivantes:
    Constante
    Original:
    Constant
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    		 Explanation
    beg
    le début d'un flux
    Original:
    the beginning of a stream
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    end
    la fin d'un cours d'eau
    Original:
    the ending of a stream
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    cur
    la position actuelle de l'indicateur de position courant
    Original:
    the current position of stream position indicator
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    Original:
    defines base position to apply the relative offset to. It can be one of the following constants:
    Constante
    Original:
    Constant
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    		 Explanation
    beg
    le début d'un flux
    Original:
    the beginning of a stream
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    end
    la fin d'un cours d'eau
    Original:
    the ending of a stream
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    cur
    la position actuelle de l'indicateur de position courant
    Original:
    the current position of stream position indicator
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    The text has been machine-translated via Google Translate.
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    Retourne la valeur

    *this

    Exemple

    #include <iostream>
#include <string>
#include <sstream>
int main()
{
    std::string str = "Hello, world";
    std::istringstream in(str);
    std::string word1, word2;
    in >> word1;
    in.seekg(0); // rewind
    in >> word2;
    std::cout << "word1 = " << word1 << '\n'
              << "word2 = " << word2 << '\n';
}

    Résultat : 

    word1 = Hello,
word2 = Hello,

    Voir aussi
    renvoie l'indicateur de position d'entrée
    Original:
    returns the input position indicator
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    (fonction membre publique) [edit]
    renvoie l'indicateur de position de sortie
    Original:
    returns the output position indicator
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    (fonction membre publique de std::basic_ostream) [edit]
    définit l'indicateur de position de sortie
    Original:
    sets the output position indicator
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    (fonction membre publique de std::basic_ostream) [edit]