Function classify

06_pattern_matching/rust/pattern_matching.rs:14–19

(animal: Animals)

}

fn classify(animal: Animals) {
    match animal {
        Animals::Cat(Cat {age}) => println!("A cat that's {} years old", age),
        Animals::Dog(d) => println!("A dog named {}", d.name),
    }
}

fn number(x: i32) {
    match x {