pointer in C++

Dear Experts,
When we read the tutorial for pointer in C++ on internet articles, most likey, swap example will be used,
for example,

#include <iostream>
using namespace std;
void swap(int *a, int *b){
 int temp = *a;
  *a = *b;
  *b = temp;
}
int main() {
int x = 42;
int y = 17;

swap(x, y);
cout <<x << '\n';//17
cout <<y << '\n';//42
return 0;
}

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Probably it use swap the pointer to address's vaue to achieve the swapping.In other words, swap thier value. I want to know could we do it in other way, swap the pointer to address instead of its value ?

For example , before swap
&x //address of x =FFAA00 and its value=42
&y /address of y =BBCC00a and its value=17

after swap
&x //address of x =BBCC00 and its new value=17
&y /address of y =FFAA00 and its new value=42

Or I need to think about to do that using pointer of pointer

Please advise
Rwniceing