queue::size

Returns the number of elements in the queue.

size_type size( ) const;

Return Value

The current length of the queue.

Example

// queue_size.cpp
// compile with: /EHsc
#include <queue>
#include <iostream>

int main( )
{
   using namespace std;
   queue <int> q1, q2;
   queue <int>::size_type i;

   q1.push( 1 );
   i = q1.size( );
   cout << "The queue length is " << i << "." << endl;

   q1.push( 2 );
   i = q1.size( );
   cout << "The queue length is now " << i << "." << endl;
}

The queue length is 1.
The queue length is now 2.

Requirements

Header: <queue>

Namespace: std

See Also

Reference

queue Class

queue Functions

Standard Template Library