void pop ( );

Remove top element

Removes the element on top of the priority_queue, effectively reducing its size by one. The value of this element can be retrieved before being popped by calling member priority_queue::top.

This calls the removed element's destructor.

This member function effectively calls the pop_heap algorithm to keep the heap property of priority_queues and then calls the member function pop_back of the underlying container object to remove the element.

Parameters

Return value

Example

// priority_queue::push/pop
#include <iostream>
#include <queue>
using namespace std;

int main ()
{
  priority_queue<int> mypq;

  mypq.push(30);
  mypq.push(100);
  mypq.push(25);
  mypq.push(40);

  cout << "Popping out elements...";
  while (!mypq.empty())
  {
     cout << " " << mypq.top();
     mypq.pop();
  }
  cout << endl;

  return 0;
}

Output:

Popping out elements... 100 40 30 25

Complexity

See also