1 // 2 // Taken from http://doc.rust-lang.org/guide.html 3 // main()4fn main() { 5 println!("Hello, world!"); 6 } 7 struct Circle { 8 x: f64, 9 y: f64, 10 radius: f64, 11 } 12 13 impl Circle { area(&self) -> f6414 fn area(&self) -> f64 { 15 std::f64::consts::PI * (self.radius * self.radius) 16 } 17 } 18