rustlings/exercises/06_move_semantics/move_semantics5.rs

// move_semantics5.rs
//
// Make me compile only by reordering the lines in `main()`, but without adding,
// changing or removing any of them.
//
// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand
// for a hint.
// [[NOTE]] 使用作用域讓可變借用的生命週期提早結束

#[test]
fn main() {
    let mut x = 100; 
    {
        let y = &mut x;
        *y += 100;
    }

    {
        let z = &mut x;
        *z += 1000;
    }
    assert_eq!(x, 1200);
}