HackerRank.com Practice > C++ > Introduction > Pointer

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Problem Link : https://www.hackerrank.com/challenges/c-tutorial-pointer/problem?h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen

#include <stdio.h>
#include <stdlib.h>

void update(int *a,int *b) {
    // Complete this function
    int a1 = *a + *b;
    *b = abs(*a - *b);
    *a = a1;
}

int main() {
    int a, b;
    int *pa = &a, *pb = &b;

    scanf("%d %d", &a, &b);
    update(pa, pb);
    printf("%d\n%d", a, b);

    return 0;
}