Thread: printing a queue

i seem to be having a problem printing a queue. when i dequeue, i am returning the value that was dequeued, and letting the user know when the queue is empty, but when i go to print the queue, the values entered are still there. i think it has to do with my dequeue function. here's the code

Code:

//in main if choice = 6 then print the queue
        if(choice == 6)
        {
            print_queue(q);
        }

//remove the front value
int dequeue(struct queue* q)
{
    int val = q->store[q->front];
    q->front = (q->front + 1) % q->size;

    return val;
}

//print queue function
void print_queue(struct queue* q)
{
    int j;
    
    for(j=0; j < q->back; j++)
        printf("%d ", q->store[j]);
        printf("\n");
}

Code:

for(j=q->front; j < q->back; j++)

Edit: Also, I don't know if you're doing "rollaround" (where q->front might be 15 and q->back might be 2, so that the queue goes 15, 16, 17, 18, 19, 0, 1, 2), but if so, then you should check != rather than <.

ok thanks that really helped!

How are you getting yours to print that way? When I changed my loop like that all it printed for me was a new line...