Espaces de noms
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    operator<<<div class="t-tr-text">(Std :: basic_ostream)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::basic_ostream)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

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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
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    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
    Original:
    Error category interface
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    iostream_category (C++11)
    io_errc (C++11)
     
    std::basic_ostream
    Les objets globaux
    Original:
    Global objects
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    Les fonctions membres
    Original:
    Member functions
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    basic_ostream::basic_ostream
    basic_ostream::~basic_ostream
    basic_ostream::operator= (C++11)
    Entrée formaté
    Original:
    Formatted input
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    basic_ostream::operator<<
    Entrée non formaté
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    Unformatted input
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    basic_ostream::put
    basic_ostream::write
    Positionnement
    Original:
    Positioning
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    basic_ostream::tellp
    basic_ostream::seekp
    Divers
    Original:
    Miscellaneous
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    basic_ostream::flush
    basic_ostream::swap (C++11)
    Classes de membres
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    Member classes
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    basic_ostream::sentry
    Tiers fonctions
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    Non-member functions
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    operator<<(std::basic_ostream)
     
    <tbody> </tbody>
    template< class CharT, class Traits> basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os, CharT ch ); template< class CharT, class Traits> basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os, char ch ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os, char ch ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os, signed char ch ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os, unsigned char ch );
    		 (1)
    template< class CharT, class Traits > basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os, const CharT* s ); template< class CharT, class Traits > basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os, const char* s ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os, const char* s ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os, const signed char* s ); template< class Traits > basic_ostream<char,Traits>& operator<<( basic_ostream<char,traits>& os, const unsigned char* s );
    		 (2)
    template< class CharT, class Traits, class T > basic_ostream< charT, traits >& operator<<( basic_ostream<CharT,Traits>&& os, const T& value );
    		 (3) (depuis C++11)
    Insère un caractère ou une chaîne de caractères .
    Original:
    Inserts a character or a character string.
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    1-2)

    sont formatés fonctions de sortie: ils commencent l'exécution par la construction d'un objet de sentry type, qui vide les tampons de sortie tie()'d si nécessaire et vérifie les erreurs de flux. Après la construction, si les rendements objet sentinelle false, ces fonctions renvoient sans tenter aucune sortie. Si une erreur se produit lors de la sortie, ces fonctions setstate(ios_base::failbit) appeler. Si une exception est levée lors de la sortie, puis ios :: BadBit est activé (l'exception est supprimée, sauf exceptions()&badbit) != 0, auquel cas il est relancée)
    Original:
    are formatted output functions: they begin execution by constructing an object of type sentry, which flushes the tie()'d output buffers if necessary and checks the stream errors. After construction, if the sentry object returns false, these functions return without attempting any output. If an error occurs during output, these functions call setstate(ios_base::failbit). If an exception is thrown during output, then ios::badbit is set (the exception is suppressed unless exceptions()&badbit) != 0, in which case it is rethrown)
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    1)

    Insère un caractère ch. Si le type de caractère n'est pas CharT, il est tout d'abord converti en os.widen(ch). Le remplissage est déterminé comme si au stade 3 de num_put::put(). Après l'insertion, width(0) est appelé .
    Original:
    Inserts a character ch. If the type of the character is not CharT, it is first converted with os.widen(ch). Padding is determined as if by Stage 3 of num_put::put(). After insertion, width(0) is called.
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    2)

    Insère des caractères successifs du tableau de caractères dont le premier élément est pointé par s .
    Original:
    Inserts successive characters from the character array whose first element is pointed to by s.
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    • pour les surcharges premier et troisième (où CharT correspond au type de ch), exactement traits::length(s) caractères sont insérés .
      Original:
      for the first and third overloads (where CharT matches the type of ch), exactly traits::length(s) characters are inserted.
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    • pour la deuxième surcharge, exactement std::char_traits<char>::length(s) caractères sont insérés .
      Original:
      for the second overload, exactly std::char_traits<char>::length(s) characters are inserted.
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    • pour les deux dernières surcharges, exactement traits::length(reinterpret_cast<const char*>(s)) sont insérés .
      Original:
      for the last two overloads, exactly traits::length(reinterpret_cast<const char*>(s)) are inserted.
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    Le remplissage est déterminé comme si au stade 3 de num_put::put(). Tous les caractères sont élargies à l'aide os.widen() avant l'insertion. Après l'insertion, width(0) est appelé .
    Original:
    Padding is determined as if by Stage 3 of num_put::put(). All characters are widened using os.widen() before insertion. After insertion, width(0) is called.
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    3)

    Appelle l'opérateur d'insertion approprié, compte tenu d'une référence rvalue à un objet flux de sortie (équivalent à os << value) .
    Original:
    Calls the appropriate insertion operator, given an rvalue reference to an output stream object (equivalent to os << value).
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    Paramètres

    os -
    flux de sortie d'insérer les données
    Original:
    output stream to insert data to
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    ch -
    une référence à un caractère à insérer
    Original:
    reference to a character to insert
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    s -
    pointeur vers une chaîne de caractères à insérer
    Original:
    pointer to a character string to insert
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    Retourne la valeur

    st

    Exemple

    #include <iostream>
#include <sstream>
int main()
{
    std::cout << "Hello, world" // the const char* overlaod
              << '\n';          // the char overload
    std::string s = (std::ostringstream() << 1.2).str(); // rvalue overload
    std::cout << s << '\n';
}

    Résultat : 

    Hello, world
1.2

    Voir aussi
    inserts en forme des données
    Original:
    inserts formatted data
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