std::vector::back

 

C++

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std::vector

Las funciones miembro 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.

vector::vector

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vector::assign

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Elemento acceso 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.

vector::at

vector::operator[]

vector::front

vector::back

vector::data (C++11)

Los iteradores Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::beginvector::cbegin (C++11)

vector::endvector::cend (C++11)

vector::rbeginvector::crbegin (C++11)

vector::rendvector::crend (C++11)

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

vector::empty

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reference back();
const_reference back() const;

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.

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Parámetros

(Ninguno)

Original:

(none)

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Valor de retorno

referencia al último elemento

Original:

reference to the last element

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Complejidad

Constant

Original:

Constant

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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; }

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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

Ver también

front

acceso 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)