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std::vector::size

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< cpp‎ | container‎ | vector

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C++
 
Bibliothèque de conteneurs
 
std::vector
Les fonctions membres
Original:
Member functions
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vector::vector
vector::~vector
vector::operator=
vector::assign
vector::get_allocator
Elément d'accès
Original:
Element access
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vector::at
vector::operator[]
vector::front
vector::back
vector::data (C++11)
Les itérateurs
Original:
Iterators
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vector::begin
vector::cbegin
(C++11)
vector::end
vector::cend
(C++11)
vector::rbegin
vector::crbegin
(C++11)
vector::rend
vector::crend
(C++11)
Capacité
Original:
Capacity
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vector::empty
vector::size
vector::max_size
vector::reserve
vector::capacity
vector::shrink_to_fit (C++11)
Modificateurs
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Modifiers
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vector::clear
vector::insert
vector::emplace (C++11)
vector::erase
vector::push_back
vector::emplace_back (C++11)
vector::pop_back
vector::resize
vector::swap
 
size_type size() const;

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

noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Complexité

Constant

[modifier] Exemple

The following code uses size to display the number of elements in a std::vector<int>: 

#include <vector>
#include <iostream>
 
int main()
{
    std::vector<int> nums {1, 3, 5, 7};
 
    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Résultat : 

nums contains 4 elements.

[modifier] Voir aussi

 renvoie le nombre d'éléments qui peuvent être contenus dans l'espace mémoire actuellement alloué
(fonction membre publique) [edit]
vérifie si le conteneur est vide
Original:
checks whether the container is empty
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(fonction membre publique) [edit]
retourne le plus grand nombre possible d'éléments
Original:
returns the maximum possible number of elements
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(fonction membre publique) [edit]
modifie le nombre d'éléments stockés
Original:
changes the number of elements stored
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(fonction membre publique) [edit]
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