trait ATrait {
    fn a(&mut self) -> &mut A{
        self.a()
    }
    fn b(&mut self) -> &mut i64{
        return self.a().b()
    }
}
struct A {
    b: i64
}
impl ATrait for A {
    fn a(&mut self) -> &mut A{
        self
    }
    fn b(&mut self) -> &mut i64{
        &mut self.b
    }
}

struct B {
    a: A,
    c: i64
}

impl ATrait for B{
    fn a(&mut self) -> &mut A{
        self.a.a()
    }
}



fn main() {
    let mut b: B = B{
        a: A {b: 2},
        c: 3
    };
    println!("{}", b.b());
}

struct Beer {
    bottles: i32,
}

impl Beer {
    fn new() -> Beer {
        Beer { bottles: 99 }
    }

    fn take_one_down(&mut self) {
        self.bottles -= 1;
    }

    fn no_more(&self) -> bool {
        self.bottles == 0
    }

    fn go_to_the_store(&mut self) {
        self.bottles = 99;
    }

    fn to_string(&self) -> String {
        match self.bottles {
            0 => "No more bottles".to_string(), //Reaized this is incorrect because the N could be lowercase. But technically the comma in the beer song is incorrect because it separates two whole sentences and should be a comma
            1 => "1 bottle".to_string(),
            _ => format!("{} bottles", self.bottles),
        }
    }
}

fn main() {
    let mut bottles: Beer = Beer::new();
    
    let KEEP_GOING: bool = true;
    
    let FOREVER: bool = false;
    
    let MAX_LOOPS: i32 = 2;
    
    let mut int: i32 = 0;
    
    while FOREVER | (int < MAX_LOOPS){
        print!("{} of beer on the wall, ", bottles.to_string());
        println!("{} of beer.", bottles.to_string());
        if !bottles.no_more(){
            print!("Take one down, pass it around, ");
            bottles.take_one_down();
            println!("{} of beer on the wall.", bottles.to_string());
            println!();
        } else {
            print!("Go to the store and buy some more, ");
            bottles.go_to_the_store();
            println!("{} of beer on the wall.", bottles.to_string());
            if(!KEEP_GOING){
                break; //Comment this out to keep it going
            }else{
                println!();
                int += 1;
            }
        }
    }
}