99bottles.rs

fn bottles(x : u8) -> String {
    match x {
        0 => String::from("no more bottles"),
        1 => String::from("1 bottle"),
        y => format!("{} bottles", y),
    }
}

fn phrase(x : u8) -> String {
    format!("{current} of beer on the wall
{current} of beer
Take one down, pass it around, {next} of beer on the wall
",
    current=bottles(x),
    next=bottles(x-1)
    )
}

const ZERO : &'static str =
"No more bottles of beer on the wall, no more bottles of beer.
Go to the store and buy some more, 99 bottles of beer on the wall.";

fn main() {
    for x in (1..101).rev() {
        println!("{}", phrase(x));
    }
    println!("{}", ZERO)
}