54. Swap Two Pointers Using Double Pointers

#include <stdio.h>

void swap_pointers(int **p1, int **p2) {
    //Swap the address of both pointers
    //*p1 is the address of the pointer that points to p1
    //*p2 is the address of the pointer that points to p2
    //Create a temp int pointer to store the address of the pointer
    int *temp = *p1; //Store the address of the pointer that points to p1
    *p1 = *p2; 
    *p2 = temp;

}

int main() {
    int a, b;
    scanf("%d %d", &a, &b);

    int *p1 = &a;
    int *p2 = &b;

    swap_pointers(&p1, &p2);

    printf("%d %d", *p1, *p2);

    return 0;
}