Swap Two Pointers Using Double Pointers

Code

#include <stdio.h>

void swap_pointers(int **p1, int **p2) {        
    // Your logic here
    int temp = **p1;         // intilize temp var and store p1 value
    **p1 = **p2;             // store the p2 value in p1
    **p2 = temp;             // store the temp value in p2
}

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

void swap_pointers(int **p1, int **p2) {        

    // Your logic here

    int temp = **p1;         // intilize temp var and store p1 value

    **p1 = **p2;             // store the p2 value in p1

    **p2 = temp;             // store the temp value in p2

}