C++ bubble sort

void printArray17(int *arr, int len)
{
    for (int i = 0; i < len; i++)
    {
        cout << arr[i] << "\t";
    }
    cout << endl
         << endl;
}

void getArray16(int *arr, int len)
{
    srand(time(NULL));
    for (int i = 0; i < len; i++)
    {
        arr[i] = rand();
    }
}

void bublleSort22(int len)
{
    int *arr = new int[len];
    getArray16(arr, len);
    cout << "Before bubble sort:" << endl;
    printArray17(arr, len);
    cout << "After bubble sort:" << endl;
    bubbleSort21(arr, len);
    printArray17(arr, len);
    delete[] arr;
    cout << getTimeNow2() << ",finished in void bublleSort22(int len)!!!" << endl
         << endl;
}

void bubbleSort21(int *arr, int len)
{
    for (int i = 0; i < len; i++)
    {
        for (int j = i + 1; j < len; j++)
        {
            if (arr[i] > arr[j])
            {
                swap(&arr[i], &arr[j]);
            }
        }
    }
}

g++ -g -std=c++2a -I. *.cpp  -o h1 -luuid -lpthread

./h1 100