Swap Two Pointers Using Double Pointers

Code

#include <stdio.h>

void swap_pointers(int **p1, int **p2) 
{
    int temp=**p1; //Swapping logic is same, only difference is we are working with multilevel pointer.Hence we need to dereference twice.
    **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;
}

Solving Approach