#include<iostream>
using namespace std;

int main() {
   int a = 1; int b = -1;
   int *e = &a; int *f = &b;
   *e = a + *f;
   e = f;
   cout << "a = " << a << endl;
   cout << "b = " << b << endl;
}

a = 0
b = -1