std::array::back
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| reference back(); |
(depuis C++11) | |
| const_reference back() const; |
(depuis C++11) | |
Retourne référence au dernier élément dans le conteneur .
Original:
Returns reference to the last element in the container.
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Appel
back sur un contenant vide est indéfini .Original:
Calling
back on an empty container is undefined.The text has been machine-translated via Google Translate.
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Sommaire |
[modifier] Paramètres
(Aucun)
Original:
(none)
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[modifier] Retourne la valeur
référence au dernier élément
Original:
reference to the last element
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[modifier] Complexité
Constante
Original:
Constant
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[modifier] Notes
Pour une
c conteneur, le return c.back(); expression est équivalente à { auto tmp = c.end(); --tmp; return *tmp; }Original:
For a container
c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }The text has been machine-translated via Google Translate.
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[modifier] Exemple
Le code suivant utilise
back pour afficher le dernier élément d'une std::array<char>:
Original:
The following code uses
back to display the last element of a std::array<char>:
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#include <array> #include <iostream> int main() { std::array<char> letters {'o', 'm', 'g', 'w', 't', 'f'}; if (!letters.empty()) { std::cout << "The last character is: " << letters.back() << '\n'; } }
Résultat :
The last character is f
[modifier] Voir aussi
| accède au premier élément (fonction membre publique) | |
