#[derive(Debug)]
struct Point {
    pub x: i32,
    pub y: i32,
}

fn main() {
    let primary = Point { x: -10, y: 8, };
    let mut reference = &primary;
    println!("point is: {:?}", reference);
    {
        let secondary = Point { x: 5, y: 5, };
        reference = &secondary;
    }
    println!("point is: {:?}", reference);
}