54. Swap Two Pointers Using Double Pointers

#include <stdio.h>

// Implementation 4: Compact style with minimal variable declarations
void swap_pointers(int **p1, int **p2) {
    // One-liner swap using temporary variable
    int *temp = *p1; *p1 = *p2; *p2 = temp;
}

int main() {
    int a, b;
    scanf("%d %d", &a, &b);
    
    // Compact pointer initialization
    int *x = &a, *y = &b;
    
    // Perform the swap
    swap_pointers(&x, &y);
    
    // Output swapped values
    printf("%d %d", *x, *y);
    
    return 0;
}