queue::size
Retorna o número de elementos na fila.
size_type size( ) const;
Valor de retorno
O comprimento atual da fila.
Exemplo
// 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;
}
Requisitos
Cabeçalho: <queue>
namespace: STD