#include <iostream>
using namespace std;

int f1(int *a) {
    return *a + 1;
}

int *f2(int *a) {
    return a + 1;
}

int *f3(int &a) {
    return &a + 1;
}

int main() {
    int t[] = {0, 1, 2, 3};
    cout << f1(f3(*f2(t)));
    return 0;
}

f3(*f2(t))
   ^ look at this