std::boolalpha, std::noboolalpha
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<metanoindex/>
<tbody> </tbody>| Déclaré dans l'en-tête <ios>
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std::ios_base& boolalpha( std::ios_base& str ); |
(1) | |
std::ios_base& noboolalpha( std::ios_base& str ); |
(2) | |
1)
permet le drapeau
boolalpha dans le flux str comme si en appelant str.setf(std::ios_base::boolalpha)Original:
enables the
boolalpha flag in the stream str as if by calling str.setf(std::ios_base::boolalpha)The text has been machine-translated via Google Translate.
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2)
désactive le drapeau
boolalpha dans le flux str comme si en appelant str.unsetf(std::ios_base::boolalpha)Original:
disables the
boolalpha flag in the stream str as if by calling str.unsetf(std::ios_base::boolalpha)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
std::boolalpha est un manipulateur d'E / S, de sorte qu'il peut être appelé avec une expression telle que pour tout out << std::boolalpha out de std::basic_ostream type ou d'une expression telle que pour tout in >> std::boolalpha in de type std::basic_istream .Original:
std::boolalpha is an I/O manipulator, so it may be called with an expression such as out << std::boolalpha for any out of type std::basic_ostream or with an expression such as in >> std::boolalpha for any in of type std::basic_istream.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Paramètres
| str | - | référence aux flux d'entrée / sortie
Original: reference to I/O stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Retourne la valeur
str (référence au flux après la manipulation)Original:
str (reference to the stream after manipulation)The text has been machine-translated via Google Translate.
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Exemple
#include <sstream>
#include <locale>
#include <iostream>
int main()
{
// boolalpha output
std::cout << std::boolalpha
<< "boolalpha true: " << true << '\n'
<< "boolalpha false: " << false << '\n';
std::cout << std::noboolalpha
<< "noboolalpha true: " << true << '\n'
<< "noboolalpha false: " << false << '\n';
// booalpha parse
bool b1, b2;
std::istringstream is("true false");
is >> std::boolalpha >> b1 >> b2;
std::cout << '\"' << is.str() << "\" parsed as " << b1 << ' ' << b2 << '\n';
}
Résultat :
boolalpha true: true
boolalpha false: false
noboolalpha true: 1
noboolalpha false: 0
"true false" parsed as 1 0
Voir aussi
Modèle:cpp/locale/numpunct/dsc do truenameModèle:cpp/locale/numpunct/dsc do falsename efface les drapeaux ios_base spécifiées Original: clears the specified ios_base flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) | |
fixe les drapeaux ios_base spécifiées Original: sets the specified ios_base flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) |