◐ Shell
clean mode source ↗

std::stack::top - cppreference.com

De cppreference.com

<metanoindex/>

<tbody> </tbody>

reference top();

const_reference top() const;

Retorna referência para o elemento superior na pilha. Este é o elemento mais recentemente empurrado. Este elemento será removido em uma chamada para pop(). Efetivamente chama c.back().

Original:

Returns reference to the top element in the stack. This is the most recently pushed element. This element will be removed on a call to pop(). Effectively calls c.back().

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

Parâmetros

(Nenhum)

Original:

(none)

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

Valor de retorno

referência para o último elemento

Original:

reference to the last element

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

Complexidade

Constante

Original:

Constant

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

Veja também

inserts element at the top
(função pública membro) [edit]

remove o elemento superior

Original:

removes the top 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) [edit]

Exemplo

#include <stack>
#include <iostream>

int main()
{
    std::stack<int>   s;

    s.push( 2 );
    s.push( 6 );
    s.push( 51 );

    std::cout << s.size() << " elements on stack\n";
    std::cout << "Top element: "
	      << s.top()         // Leaves element on stack
	      << "\n";
    std::cout << s.size() << " elements on stack\n";
    s.pop();
    std::cout << s.size() << " elements on stack\n";
    std::cout << "Top element: " << s.top() << "\n";
  
    return 0;
}

Saída: 

3 elements on stack
Top element: 51
3 elements on stack
2 elements on stack
Top element: 6