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std::basic_ostream::operator<<

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< cpp‎ | io‎ | basic ostream

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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
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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
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Positioning
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basic_ostream::tellp
basic_ostream::seekp
Divers
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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)
 
basic_ostream& operator<<( short value );
basic_ostream& operator<<( unsigned short value );
 (1)
basic_ostream& operator<<( int value );
basic_ostream& operator<<( unsigned int value );
 (2)
basic_ostream& operator<<( long value );
basic_ostream& operator<<( unsigned long value );
 (3)
basic_ostream& operator<<( long long value );
basic_ostream& operator<<( unsigned long long value );
 (4) (depuis C++11)
basic_ostream& operator<<( float value );

basic_ostream& operator<<( double value );

basic_ostream& operator<<( long double value );
 (5)
basic_ostream& operator<<( bool value );
 (6)
basic_ostream& operator<<( const void* value );
 (7)
basic_ostream& operator<<( std::basic_streambuf<CharT, Traits>* sb);
 (8)
basic_ostream& operator<<( basic_ostream& st,

                           std::ios_base& (*func)(std::ios_base&) );
basic_ostream& operator<<( basic_ostream& st,
                           std::basic_ios<CharT,Traits>& (*func)(std::basic_ios<CharT,Traits>&) );
basic_ostream& operator<<( basic_ostream& st,

                           std::basic_ostream& (*func)(std::basic_ostream&) );
 (9)
Insère des données dans le flux .
Original:
Inserts data into the stream.
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Les versions (1-7) de l'opérateur de se comporter comme des fonctions de sortie formatée, et le 8) se comporte comme la version fonction de sortie non formatée. Ces fonctions commencer 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, les fonctions renvoient sans tenter aucune sortie. Si une erreur se produit lors de la sortie, les fonctions de sortie formatée mis setstate(ios_base::failbit). 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:
The (1-7) versions of the operator behave as formatted output functions, and the 8) version behaves as unformatted output function. These functions 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, the functions return without attempting any output. If an error occurs during output, formatted output functions set 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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1-2)
Si value est short ou int, jette ensuite à unsigned short ou unsigned int si ios_base::flags() & ios_base::basefield est ios_base::oct ou ios_base::hex. Après cela, jette à long en tout cas et sorties comme en 3). Si value est unsigned short ou unsigned int, jette à unsigned long et sorties comme en 3)
Original:
If value is short or int, then casts it to unsigned short or unsigned int if ios_base::flags() & ios_base::basefield is ios_base::oct or ios_base::hex. After that, casts to long in any case and outputs as in 3). If value is unsigned short or unsigned int, casts to unsigned long and outputs as in 3)
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3-4)
Insère une valeur entière en appelant num_put::put(). Si la condition de fin de fichier a été rencontré lors de la sortie (put().failed() == true), définit ios::badbit .
Original:
Inserts an integer value by calling num_put::put(). If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.
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5)
Insère une valeur à virgule flottante en appelant num_put::put() Si la condition de fin de fichier a été rencontré lors de la sortie (put().failed() == true), établit ios::badbit .
Original:
Inserts a floating point value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.
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6)
Inserts bool valeur en appelant num_put::put() Si la condition de fin de fichier a été rencontré lors de la sortie (put().failed() == true), établit ios::badbit .
Original:
Inserts bool value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.
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7)
Insère une valeur de pointeur générique en appelant num_put::put() Si la condition de fin de fichier a été rencontré lors de la sortie (put().failed() == true), établit ios::badbit .
Original:
Inserts a generic pointer value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.
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8)
Insère toutes les données du sb. Après avoir construit l'objet sentinelle, vérifie si sb est un pointeur NULL. Si c'est le cas, exécute setstate(badbit) et des sorties. Autrement, extrait les caractères de la séquence d'entrée commandé par sb et les insère dans *this jusqu'à l'une des conditions suivantes sont respectées:
Original:
Inserts all data from sb. After constructing the sentry object, checks if sb is a null pointer. If it is, executes setstate(badbit) and exits. Otherwise, extracts characters from the input sequence controlled by sb and inserts them into *this until one of the following conditions are met:
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  • de fin de fichier se produit sur la séquence d'entrée;
    Original:
    end-of-file occurs on the input sequence;
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  • l'insertion, dans la séquence de sortie échoue (dans ce cas, le caractère d'être ajouté n'est pas extrait);
    Original:
    inserting in the output sequence fails (in which case the character to be inserted is not extracted);
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  • une exception se produit (dans ce cas, l'exception est interceptée) .
    Original:
    an exception occurs (in which case the exception is caught).
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Si aucun caractère ont été insérés, exécute setstate(badbit). Si une exception a été levée lors de l'extraction, met failbit
Original:
If no characters were inserted, executes setstate(badbit). If an exception was thrown while extracting, sets failbit
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9)
Appels func(*this);. Cette surcharge est utilisé pour la mise en œuvre de sortie I / O manipulateurs tels que std::endl .
Original:
Calls func(*this);. This overload is used to implement output I/O manipulators such as std::endl.
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Sommaire

[modifier] Paramètres

value -
entier, virgule flottante, booléen, ou un pointeur à insérer
Original:
integer, floating-point, boolean, or pointer value to insert
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func -
fonctionner à appeler
Original:
function to call
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sb -
pointeur sur la streambuffer à lire les données de
Original:
pointer to the streambuffer to read the data from
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[modifier] Retourne la valeur

*this

[modifier] Notes

Il n'y a pas de surcharge pour les pointeurs de pointeurs volatiles ou fonction (autres que ceux avec les signatures acceptées par le 9) de surcharge). Essayez de sortir de tels objets invoque conversion implicite vers bool, et, pour toute valeur de pointeur non nul, la valeur 1 est imprimé (sauf boolalpha a été fixé) .
Original:
There are no overload for pointers to volatile or function pointers (other than the ones with signatures accepted by the 9) overload). Attempting to output such objects invokes implicit conversion to bool, and, for any non-null pointer value, the value 1 is printed (unless boolalpha was set).
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[modifier] Exemple

#include <iostream>
#include <iomanip>
#include <sstream>
int main()
{
    std::istringstream input(" \"Some text.\" ");
    volatile int n = 42;
    double f = 3.14;
    bool b = true;;
    std::cout << n   // int overload
              << ' ' // non-member overload
              << std::boolalpha << b // bool overload
              << " " // non-member overload
              << std::fixed << f // double overload
              << input.rdbuf() // streambuf overload
              << &n // bool overload
              << std::endl; // function overload
}

Résultat : 

42 true 3.140000 "Some text." true

[modifier] Voir aussi
insère des données de caractères
Original:
inserts character data
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(fonction) [edit]
effectue flux d'E / S de chaînes
Original:
performs stream I/O of strings
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(fonction générique)
effectue flux d'entrée et de sortie de bitsets
Original:
performs stream input and output of bitsets
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(fonction)
sérialise et désérialise un nombre complexe
Original:
serializes and deserializes a complex number
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(fonction générique)
effectue flux d'entrée et de sortie sur le moteur de nombres pseudo-aléatoires
Original:
performs stream input and output on pseudo-random number engine
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(fonction) [edit]
effectue flux d'entrée et de sortie sur la distribution de nombre pseudo-aléatoire
Original:
performs stream input and output on pseudo-random number distribution
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(fonction) [edit]
insère un caractère
Original:
inserts a character
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(fonction membre publique) [edit]
blocs inserts de caractères
Original:
inserts blocks of characters
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(fonction membre publique) [edit]
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