std::vector::back
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reference back(); |
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const_reference back() const; |
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Devuelve referencia al último elemento en el recipiente .
Original:
Returns reference to the last element in the container.
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Llamar a
back
en un recipiente vacío es indefinido .Original:
Calling
back
on an empty container is undefined.The text has been machine-translated via Google Translate.
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Contenido |
[editar] Parámetros
(Ninguno)
Original:
(none)
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[editar] Valor de retorno
referencia al último elemento
Original:
reference to the last element
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[editar] Complejidad
Constant
Original:
Constant
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[editar] Notas
Para una
c
contenedor, el return c.back(); expresión es 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; }The text has been machine-translated via Google Translate.
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[editar] Ejemplo
El código siguiente utiliza
back
para mostrar el último elemento de una 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'; } }
Salida:
The last character is f
[editar] Ver también
accede al primer 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. (función miembro público) |