pub mod kitty { use std::fmt; pub struct cat { meows : usize, pub how_hungry : isize, pub name : String, } impl fmt::Display for cat { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{}", self.name) } } impl cat { fn meow(&mut self) { println!("Meow"); self.meows += 1; if self.meows % 5 == 0 { self.how_hungry += 1; } } } impl cat { pub fn speak(&mut self) { self.meow(); } pub fn eat(&mut self) -> bool { if self.how_hungry > 0 { println!("OM NOM NOM"); self.how_hungry -= 2; return true; } else { println!("Not hungry!"); return false; } } } pub fn cat(in_x : usize, in_y : isize, in_name: String) -> cat { cat { meows: in_x, how_hungry: in_y, name: in_name } } }