54. Swap Two Pointers Using Double Pointers

#include <stdio.h>

void swap_pointers(int **q1, int **q2) {
    // Your logic here
    int *hold;
    hold = *q1;
    *q1 = *q2;
    *q2 = hold;
}


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;
}

given two addresses to pointers so you can change the content , which is pointing to int