std::unordered_map::size
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< cpp | container | unordered map
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| size_type size() const; |
(depuis C++11) | |
Returns the number of elements in the container, i.e. std::distance(begin(), end()).
Sommaire |
[modifier] Paramètres
(Aucun)
Original:
(none)
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[modifier] Retourne la valeur
le nombre d'éléments dans le conteneur
Original:
the number of elements in the container
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[modifier] Exceptions
[modifier] Complexité
Constant
[modifier] Exemple
The following code uses size to display the number of elements in a std::unordered_map<int>:
#include <unordered_map> #include <iostream> int main() { std::unordered_map<int, char> nums {{1, 'a'}, {3, 'b'}, {5, 'c'}, {7, 'd'}}; std::cout << "nums contains " << nums.size() << " elements.\n"; }
Résultat :
nums contains 4 elements.
[modifier] Voir aussi
| vérifie si le conteneur est vide Original: checks whether the container is empty The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
| retourne le plus grand nombre possible d'éléments Original: returns the maximum possible number of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
