The meaning of *& and **& in c++

Question

What is the meaning of these pointers in c++ (*& and **&)

Answer 1

#include <stdio.h>

int main()
{
int x = 5;
int* px = &x;
printf("%d\n", *&x); // 5
printf("%d\n", **&px); // 5
return 0;
}

Answer 2

another usage:

#include <stdio.h>

void dt(int*& x, int**& y)
{
*x = 50;
printf("%d\n", *x); // 50
**y = 60;
}

int main()
{
int n = 5;
int* a = &n;
int** b = &a;
dt(a, b);
printf("%d\n", n); // 60
return 0;
}