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//! Fern allows you to manipulate ferns. //! It's a sample crate to testing purpose. //! //! ```js //! console.log(1 === 1); //! ``` #[derive(Debug)] pub struct Fern { pub size: f64, pub growth_rate: f64, } impl Fern { /// Simulate a fern growing for one day. pub fn grow(&mut self) { self.size *= 1.0 + self.growth_rate; } } /// Run a fern simulation for some number of days. pub fn run_simulation(fern: &mut Fern, days: usize) { for _ in 0..days { fern.grow(); } }