Swap Two Pointers Using Double Pointers

Code

#include <stdio.h>

void swap_pointers(int **p1, int **p2) {
    // Your logic here
    **p1 = **p1 + **p2 -(**p2 = **p1);
}

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

 

 

 

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Input

10 20

Expected Output

20 10