How to bubble sort an array stored inside a class? [closed]

I have a simple class that contains a fixed size int array. The class can initialize the array, shuffle it, and print it:

#include <iostream>
#include <algorithm>
#include <random>

using namespace std;

class Array
{
    public:
        int array[8];

        void init()                                                            {
            array[0] = 1;
            array[1] = 2;
            array[2] = 3;
            array[3] = 4;
            array[4] = 5;
            array[5] = 6;                                                          array[6] = 7;
            array[7] = 8;
        }

        void shuffle()
        {
            random_device rd;
            mt19937 g(rd());

            std::shuffle(
                &array[0],
                &array[8],
                g
            );
        }

        void show()
        {
            for (int i = 8 - 1; i >= 0; i--)
                cout << array[i] << "\n";
        }
};

int main()
{
    Array arr;

    arr.init();
    arr.shuffle();
    arr.show();

    return 0;
}

My goal is to implement bubble sort in a separate function outside the class.

What is the correct way to sort the array from outside the class while keeping the class structure as it is?