Namespace
Varianti

std::set::size

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< cpp‎ | container‎ | set

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C++
 
Contenitori libreria
 
std::set
Membri funzioni
Original:
Member functions
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set::set
set::~set
set::operator=
set::get_allocator
Iteratori
Original:
Iterators
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set::begin
set::cbegin
(C++11)
set::end
set::cend
(C++11)
set::rbegin
set::crbegin
(C++11)
set::rend
set::crend
(C++11)
Capacità
Original:
Capacity
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set::empty
set::size
set::max_size
Modificatori
Original:
Modifiers
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set::clear
set::insert
set::emplace(C++11)
set::emplace_hint(C++11)
set::erase
set::swap
Lookup
Original:
Lookup
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set::count
set::find
set::equal_range
set::lower_bound
set::upper_bound
Osservatori
Original:
Observers
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set::key_comp
set::value_comp
 
size_type size() const;

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::set<int>: 

#include <set>
#include <iostream>
 
int main()
{
    std::set<int> nums {1, 3, 5, 7};
 
    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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(metodo pubblico) [modifica]
restituisce il massimo numero possibile di elementi
Original:
returns the maximum possible number of elements
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(metodo pubblico) [modifica]
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