std::array::back - cppreference.com
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      std::array::back

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      <metanoindex/>

       
      C++
       
      Recipientes biblioteca
       
      std::array
      Funções de membro
      Original:
      Member functions
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      acesso. Elemento
      Original:
      Element access
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      array::at
      array::operator[]
      array::front
      array::back
      array::data
      Iteradores
      Original:
      Iterators
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      array::begin
      array::cbegin
      array::end
      array::cend
      array::rbegin
      array::crbegin
      array::rend
      array::crend
      Capacidade
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      Capacity
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      array::empty
      array::size
      array::max_size
      Modificadores
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      Modifiers
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      array::fill
      array::swap
      Não-membros funções
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      Non-member functions
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      Classes auxiliares
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      Helper classes
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      <tbody> </tbody>
      reference back();
      		 (desde C++11)
      const_reference back() const;
      		 (desde C++11)
      Retorna referência ao último elemento do recipiente.
      Original:
      Returns reference to the last element in the container.
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      Chamando back em um recipiente vazio é indefinido.
      Original:
      Calling back on an empty container is undefined.
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      Parâmetros

      (Nenhum)
      Original:
      (none)
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      Valor de retorno

      referência para o último elemento
      Original:
      reference to the last element
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      Complexidade

      Constante
      Original:
      Constant
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      Notas

      Para uma c recipiente, o return c.back(); expressão é equivalente a { auto tmp = c.end(); --tmp; return *tmp; }
      Original:
      For a container c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }
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      Exemplo

      O código a seguir usa back para exibir o último elemento de uma std::array<char>:
      Original:
      The following code uses back to display the last element of a std::array<char>:
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      #include <array>
#include <iostream>
 
int main()
{
    std::array<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
 
    if (!letters.empty()) {
        std::cout << "The last character is: " << letters.back() << '\n';
    }  
}

      Saída: 

      The last character is f

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