std::vector::back

<metanoindex/>

 

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std::vector

Funções de membro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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acesso. Elemento Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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<tbody> </tbody>

reference back();
const_reference back() const;

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::vector<char>:

Original:

The following code uses back to display the last element of a std::vector<char>:

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#include <vector>
#include <iostream>
 
int main()
{
    std::vector<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

Veja também

front	acesso ao primeiro elemento Original: access the first element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro)