public member function

std::priority_queue::size

<queue>
size_type size ( ) const;
Return size
Returns the number of elements in the priority_queue.

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

Parameters

none

Return Value

The number of elements that conform the priority_queue's container content.

Member type size_type is an unsigned integral type.

Example

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

int main ()
{
  priority_queue<int> myints;
  cout << "0. size: " << (int) myints.size() << endl;

  for (int i=0; i<5; i++) myints.push(i);
  cout << "1. size: " << (int) myints.size() << endl;

  myints.pop();
  cout << "2. size: " << (int) myints.size() << endl;

  return 0;
}


Output:
0. size: 0
1. size: 5
2. size: 4

Complexity

Constant.

See also

priority_queue::empty
Test whether container is empty (public member function)