please!

#include <iostream>
using namespace std;


class rsvQueue
{
    friend ostream& operator<<(ostream& os,  rsvQueue& ex);
private:
    int maxSize;
    int *rsvArray;
    int front;
    int rear;
    int nItems;
public:

    rsvQueue(int size)
    {
        this->maxSize = size;
        rsvArray = new int[maxSize];
        front = 0;
        rear = -1;
        nItems = 0;
    }
    ~rsvQueue(){
        delete[] rsvArray;
    }
    void push(int element)
    {
        if (rear == maxSize - 1)
            rear = -1;
        rear++;
        rsvArray[rear] = element;
        nItems++;
    }
    int pop()
    {
        front++;
        int temp = rsvArray[front];
        if (front == maxSize)
            front = 0;
        nItems--;
        return temp;
    }
    int peek()
    {
        return rsvArray[front];
    }
    bool isEmpty()
    {
        return (nItems == 0);
    }
    bool isFull()
    {
        return (nItems == maxSize);
    }
    int size()
    {
        return nItems;
    }
};

ostream& operator<<(ostream& os,  rsvQueue& ex)
{
    while (!ex.isEmpty())
    {
        int n = ex.pop();
        os << " " << n;
    }
    os << " ";

    return os;
}


int main()
{

    rsvQueue rsv(15);

    rsv.push(12);
    rsv.push(454);

    rsv.push(14);
    rsv.push(5411);
    cout << endl << rsv << endl;
    system("pause");








}