queue::back


public member function
      value_type& back ( );
const value_type& back ( ) const;

Access last element

Returns a reference to the last element in the queue. This is the "newest" element in the queue i.e. the last element pushed into queue.

This member function effectively calls the member with the same name in the underlying container object.

Parameters

none

Return value

A reference to the last element in the queue.

Member type value_type is defined to the type of value contained by the underlying container, which shall be the same as the first template parameter (T).

Example

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// queue::front
#include <iostream>
#include <queue>
using namespace std;

int main ()
{
  queue<int> myqueue;

  myqueue.push(12);
  myqueue.push(75);   // this is now the back

  myqueue.back() -= myqueue.front();

  cout << "myqueue.back() is now " << myqueue.back() << endl;

  return 0;
}


Output:
myqueue.back() is now 63


Complexity

Constant.

See also

queue::front Access next element (public member function)
queue::push Insert element (public member function)