// fix paste

struct Point {
    pub x: f32,
    pub y: f32,
}

struct Circle {
    pub center: Point,
    pub radius: f32,
}

struct Uuid {
    repr: u128,
}

fn square(x: f64) -> f64 {
    x * x
}

fn gcd(a: u32, b: u32) -> u32 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}


fn main() {
    // Prints four lines
    for i in 0..4 {
        println!("line {}", i);
    }
}