Reference
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STL Containers
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priority_queue
priority_queue::priority_queue
member functions:
priority_queue::empty
priority_queue::pop
priority_queue::push
priority_queue::size
priority_queue::top


priority_queue::push

public member function
void push ( const T& x );

Insert element

Inserts a new element in the priority_queue. The content of this new element is initialized to a copy of x.

This member function effectively calls the member function push_back of the underlying container object, and then calls the push_heap algorithm to keep the heap property of priority_queues.

Parameters

x
Value to be copied to the new element.
T is the first template parameter (the type of the elements stored in the stack).

Return value

none

Example

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// 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

Constant (in the priority_queue). Although notice that push_heap operates in logarithmic time.

See also

priority_queue::pop Remove top element (public member function)
priority_queue::size Return size (public member function)