use std::time::Instant;

struct RandInt(Instant);

impl RandInt {
    fn new() -> RandInt {
        RandInt(Instant::now())
    }
    fn rand_u8(&self) -> u8 {
        (self.0.elapsed().subsec_nanos() % 256) as u8
    }
}

fn main() {
    let rng = RandInt::new();

    println!("My kind of random u8: {}", rng.rand_u8());

    let mut counts = [0; 256];

    for _ in 0..=1_000_000 {
        counts[rng.rand_u8() as usize] += 1;
    }

    for (i, &val) in (&counts).iter().enumerate() {
        println!("{} occured {}% of the time.", i, val as f64 / 1_000_000f64 * 100.0);
    }
}