// $ rustc ownersystem_1.rs 
// $ ./ownersystem_1
struct Bob {
    n: Vec<i32>
}

impl Bob {
    fn new() -> Bob {
        Bob { n: Vec::new() }
    }
}

fn func_1() {
    let n = Bob::new();
    func_2(n);
    //is now out of scope as func_2 owns n now.
    //println!("{}", bob.n[0]);
}

fn func_2(b: Bob) {
    println!("{}", b.n[0]);
}

fn main() {
    func_1();
}