Namespace
Varianti

std::unordered_multimap::size

Da cppreference.com.

 
 
 
std :: unordered_multimap
Membri funzioni
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Member functions
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unordered_multimap::unordered_multimap
unordered_multimap::~unordered_multimap
unordered_multimap::operator=
unordered_multimap::get_allocator
Iteratori
Original:
Iterators
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unordered_multimap::begin
unordered_multimap::cbegin
unordered_multimap::end
unordered_multimap::cend
Capacità
Original:
Capacity
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unordered_multimap::erase
unordered_multimap::size
unordered_multimap::max_size
Modificatori
Original:
Modifiers
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unordered_multimap::clear
unordered_multimap::insert
unordered_multimap::emplace
unordered_multimap::emplace_hint
unordered_multimap::erase
unordered_multimap::swap
Lookup
Original:
Lookup
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unordered_multimap::count
unordered_multimap::find
unordered_multimap::equal_range
Benna interfaccia
Original:
Bucket interface
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unordered_multimap::begin2
unordered_multimap::end2
unordered_multimap::bucket_count
unordered_multimap::max_bucket_count
unordered_multimap::bucket_size
unordered_multimap::bucket
Politica di Hash
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Hash policy
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unordered_multimap::load_factor
unordered_multimap::max_load_factor
unordered_multimap::rehash
unordered_multimap::reserve
Osservatori
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Observers
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unordered_multimap::hash_function
unordered_multimap::key_eq
 
size_type size() const;
(dal C++11)

Returns the number of elements in the container, i.e. std::distance(begin(), end()).

Indice

[modifica] Parametri

(Nessuno)
Original:
(none)
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[modifica] Valore di ritorno

il numero di elementi nel contenitore
Original:
the number of elements in the container
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Complessità

Constant

[modifica] Esempio

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

#include <unordered_multimap>
#include <iostream>
 
int main()
{
    std::unordered_multimap<int, char> nums {{1, 'a'}, {3, 'b'}, {5, 'c'}, {7, 'd'}};
 
    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Output:

nums contains 4 elements.

[modifica] Vedi anche

verifica se il contenitore è vuoto
Original:
checks whether the container is empty
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(membro pubblico funzione) [edit]
restituisce il massimo numero possibile di elementi
Original:
returns the maximum possible number of elements
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(membro pubblico funzione) [edit]