Data Structures | Queue | Question 11

Consider the following pseudo-code. Assume that IntQueue is an integer queue. What does the function fun do? 

fun(int n)
{    IntQueue q = new IntQueue();
    q.enqueue(0);    q.enqueue(1);
    for (int i = 0; i < n; i++)
    { 
       int a = q.dequeue();
        int b = q.dequeue();
        q.enqueue(b);
        q.enqueue(a + b);
        print(a);
    }
}