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    std::operator<<,>>

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    <metanoindex/>

     
    C++
     
    Bibliothque de chanes de caractres
    Chanes zro terminal
    Original:
    Null-terminated strings
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    Les chanes d'octets
    Chaines multi-octets
    Les chanes tendues
    Classes
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    Classes
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    basic_string
    char_traits
     
    std::basic_string
    Les fonctions membres
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    Member functions
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    basic_string::basic_string
    basic_string::operator=
    basic_string::assign
    basic_string::get_allocator
    Elment d'accs
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    Element access
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    basic_string::at
    basic_string::operator[]
    basic_string::front (C++11)
    basic_string::back (C++11)
    basic_string::data
    basic_string::c_str
    Les itrateurs
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    Iterators
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    basic_string::begin
    basic_string::cbegin
    (C++11)
    basic_string::end
    basic_string::cend
    (C++11)
    basic_string::rbegin
    basic_string::crbegin
    (C++11)
    basic_string::rend
    basic_string::crend
    (C++11)
    Capacit
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    Capacity
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    basic_string::empty
    basic_string::size
    basic_string::length
    basic_string::max_size
    basic_string::reserve
    basic_string::capacity
    basic_string::shrink_to_fit (C++11)
    Oprations
    Original:
    Operations
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    basic_string::clear
    basic_string::insert
    basic_string::erase
    basic_string::push_back
    basic_string::pop_back (C++11)
    basic_string::append
    basic_string::operator+=
    basic_string::compare
    basic_string::replace
    basic_string::substr
    basic_string::copy
    basic_string::resize
    basic_string::swap
    Recherche
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    Search
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    basic_string::find
    basic_string::rfind
    basic_string::find_first_of
    basic_string::find_first_not_of
    basic_string::find_last_of
    basic_string::find_last_not_of
    Constantes
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    Constants
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    basic_string::npos
    Tiers fonctions
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    Non-member functions
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    operator+
    operator==
    operator!=
    operator<
    operator>
    operator<=
    operator>=
    swap(std::basic_string)
    operator<<
    operator>>
    getline
    stoi
    stol
    stoll    		 (C++11)
    (C++11)
    (C++11)
    stoul
    stoull    		 (C++11)
    (C++11)
    stof
    stod
    stold    		 (C++11)
    (C++11)
    (C++11)
    to_string (C++11)
    to_wstring (C++11)
    Classes d'aide
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    Helper classes
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    hash<std::string>
    hash<std::wstring>
    hash<std::u32string>
    hash<std::u16string>    		 (C++11)
     
    <tbody> </tbody>
    Dclar dans l'en-tte <string>
    template <class CharT, class Traits, class Allocator> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::basic_string<CharT, Traits, Allocator>& str);
    		 (1)
    template <class CharT, class Traits, class Allocator> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, std::basic_string<CharT, Traits, Allocator>& str);
    		 (2)

    1)

    Tout d'abord, construit un objet std::basic_ostream::sentry, qui vacue la cravate () 'd flux si ncessaire et vrifie les erreurs. Si l'objet sentinelle retourne false, quitte immdiatement .
    Original:
    First, constructs a std::basic_ostream::sentry object, which flushes the tie()'d stream if necessary and checks for errors. If the sentry object returns false, exits immediately.
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    Ensuite, si l'objet true retours sentinelle, dtermine le rembourrage format de sortie de la mme manire que l'tape 3 de num_put::put() .
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    Afterwards, if the sentry object returns true, determines the output format padding in the same manner as stage 3 of num_put::put().
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    Puis stocke chaque caractre de la squence rsultante (le contenu de str ainsi padding) pour le flux de sortie os comme si en appelant os.rdbuf()->sputn(seq, n), o n=std::max(os.width(), str.size())
    Original:
    Then stores each character from the resulting sequence (the contents of str plus padding) to the output stream os as if by calling os.rdbuf()->sputn(seq, n), where n=std::max(os.width(), str.size())
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    Enfin, les appels os.width(0) .
    Original:
    Finally, calls os.width(0).
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    2)

    Tout d'abord, construit un objet std::basic_istream::sentry, qui vacue la cravate () 'd flux si ncessaire, des extraits et des rejets tous les personnages principaux espaces blancs moins que le drapeau ios_base::skipws a t dfriches, et vrifie les erreurs. Si l'objet sentinelle retourne false, quitte immdiatement .
    Original:
    First, constructs a std::basic_istream::sentry object, which flushes the tie()'d stream if necessary, extracts and discards all leading whitespace characters unless the ios_base::skipws flag was cleared, and checks for errors. If the sentry object returns false, exits immediately.
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    Ensuite, si les rendements objet sentinelle true, efface str avec str.erase()
    Original:
    Afterwards, if the sentry object returns true, clears str with str.erase()
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    Puis lit les caractres partir de is et les ajoute str comme par str.append(1, c), jusqu' ce que l'une des conditions suivantes est remplie:
    Original:
    Then reads characters from is and appends them to str as if by str.append(1, c), until one of the following conditions becomes true:
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    • N caractres sont lus, o N est is.width() si is.width() > 0, sinon N est str.max_size()
      Original:
      N characters are read, where N is is.width() if is.width() > 0, otherwise N is str.max_size()
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    • la condition de fin de fichier se produit dans le courant de is
      Original:
      the end-of-file condition occurs in the stream is
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    • std::isspace(c,is.getloc()) est vrai pour le caractre suivant dans c is (ce caractre d'espacement reste dans le flux d'entre) .
      Original:
      std::isspace(c,is.getloc()) is true for the next character c in is (this whitespace character remains in the input stream).
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    Si aucun caractre n'est extraite puis std::ios::failbit est rgl sur is, ce qui peut jeter std::ios_base::failure .
    Original:
    If no characters are extracted then std::ios::failbit is set on is, which may throw std::ios_base::failure.
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    Enfin, les appels os.width(0) et dtruit l'objet std::basic_istream::sentry .
    Original:
    Finally, calls os.width(0) and destroys the std::basic_istream::sentry object.
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    Exceptions

    1)

    peut jeter std::ios_base::failure si une exception est leve lors de la sortie .
    Original:
    may throw std::ios_base::failure if an exception is thrown during output.
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    2)

    peut jeter std::ios_base::failure si aucun caractre sont extraites de is (par exemple, le flux est la fin du fichier, ou est constitu d'espaces uniquement), ou si une exception est leve lors de l'entre .
    Original:
    may throw std::ios_base::failure if no characters are extracted from is (e.g the stream is at end of file, or consists of whitespace only), or if an exception is thrown during input.
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    Paramtres

    os -
    un flux de sortie de caractres
    Original:
    a character output stream
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    is -
    un flux d'entre de caractres
    Original:
    a character input stream
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    str -
    la chane insrer ou extraire
    Original:
    the string to be inserted or extracted
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    Retourne la valeur

    1) os

    2) is

    Exemple

    #include <iostream>
#include <string>

int main()
{
    std::string greeting = "Hello, whirled!"
    std::cout << greeting << '\n';
}

    Rsultat : 

    Hello, whirled!
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