Byte Buffer Indexing

#include <iostream>
#include <cstdint>
using namespace std;

/* 
To remember;  the return value while dereferencing an array using its index varies based on usecase...
 if we are writing to an idex then buffer[i] return address if we are reading buffer[i] returns a value
 */

class ByteBuffer{
    private:
        uint8_t buffer[8];

    public:

        uint8_t& operator[](int idx){   // overload func for assignment op
            return buffer[idx];
        }

        uint8_t operator[](int idx)const{   // overload func for read op
            return buffer[idx];
        }
};

int main() {
    ByteBuffer buffer;

    for (int i = 0; i < 8; i++) {
        int x;
        cin >> x;
        buffer[i] = x;
    }

    int idx, v;
    cin >> idx >> v;

    buffer[idx] = v;

    for (int i = 0; i < 8; i++) {
        cout << (int)buffer[i] << (i == 7 ? "" : " ");
    }

    return 0;
}

Solving Approach