fn change_to(place: *mut int, value: int)
{
    *place = value;
}

fn main()
{
    let a = 1;
    let b: *int = &a;
    
    // expect: 1
    print_int(*b);

    a = 2;

    // expect: 2
    print_int(*b);

    let c: *mut int = &mut a;
    *c = 3;

    // expect: 3
    print_int(a);
    // expect: 3
    print_int(*c);

    change_to(&mut a, 4);

    // expect: 4
    print_int(a);
}