use std::cell::Cell;

​

#[derive(Debug)]

struct XStruct<'a> {

    x: &'a Cell<i32>,

}

​

fn add_and_print(x_struct: &XStruct) {

    let x = x_struct.x.get();

    x_struct.x.set(x + 1);

​

    println!("The value of x_struct in add_and_print is {:?}.", x_struct);

}

​

fn main() {

    let cell_x = Cell::new(1);

    let x_struct = XStruct { x: &cell_x };

​

    add_and_print(&x_struct);

​

    let x = cell_x.get();

    cell_x.set(x + 1);

​

    println!("Final value of x_struct is {:?}.", x_struct);

    println!("Final value of x is {:?}.", cell_x);

}