void test1() {
    IntArray a;
    int low = a.low();
    int high = a.high();
    int size = a.getSize();
    cout << "Low is " << low << endl;
    cout << "High is " << high << endl;
    for (int i=low; i<=high; i++)
        a[i] = i * 10;

    cout << "Array has " << size << " elements " << endl;
    cout << a << endl;
}