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public member function

<queue>

std::priority_queue::size

Return size

Returns the number of elements in the priority_queue.

This member function effectively calls member size of the underlying container object.


Parameters

none

Return Value

The number of elements in the underlying container.

Member type size_type is an unsigned integral type.


Example

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// priority_queue::size
#include <iostream>       // std::cout
#include <queue>          // std::priority_queue

int main ()
{
  std::priority_queue<int> myints;
  std::cout << "0. size: " << myints.size() << '\n';

  for (int i=0; i<5; i++) myints.push(i);
  std::cout << "1. size: " << myints.size() << '\n';

  myints.pop();
  std::cout << "2. size: " << myints.size() << '\n';

  return 0;
}

Output:

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


Complexity

Constant (calling size on the underlying container).

See also

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