gistfile1.txt

fn f(a: &mut i32, b: &i32){
    *a += *b;
}

fn main() {
    let mut a: i32 = 3;
    println!("Hello, world!  The number is {}", a);
    {
        let b: i32 = 2;
        f(&mut a, &b);
        println!("The number is {}", a);
    }
}