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std::vector::operator[]

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< cpp‎ | container‎ | vector

 
 
 
std::vector
Funções de membro
Original:
Member functions
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vector::vector
vector::~vector
vector::operator=
vector::assign
vector::get_allocator
acesso. Elemento
Original:
Element access
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vector::at
vector::operator[]
vector::front
vector::back
vector::data(C++11)
Iteradores
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)
Capacidade
Original:
Capacity
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vector::empty
vector::size
vector::max_size
vector::reserve
vector::capacity
vector::shrink_to_fit(C++11)
Modificadores
Original:
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
 
reference       operator[]( size_type pos );
const_reference operator[]( size_type pos ) const;
Devolve uma referência para o elemento em pos local especificado. Nenhuma verificação de limites é realizado.
Original:
Returns a reference to the element at specified location pos. No bounds checking is performed.
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Índice

[editar] Parâmetros

pos -
posição do elemento de voltar
Original:
position of the element to return
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[editar] Valor de retorno

referência ao elemento solicitado
Original:
reference to the requested element
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[editar] Complexidade

Constante
Original:
Constant
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[editar] Exemplo

O código a seguir usa operator[] ler e escrever para um std::vector<int>:
Original:
The following code uses operator[] read from and write to a std::vector<int>:
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#include <vector>
#include <iostream>
 
int main()
{
    std::vector<int> numbers {2, 4, 6, 8};
 
    std::cout << "Second element: " << numbers[1] << '\n';
 
    numbers[0] = 5;
 
    std::cout << "All numbers:";
    for (auto i : numbers) {
        std::cout << ' ' << i;
    }
    std::cout << '\n';
}

Output:

Second element: 4
All numbers: 5 4 6 8

[editar] Veja também

acessar o elemento especificado com verificação de limites
Original:
access specified element with bounds checking
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(função pública membro) [edit]