use std::env;

struct Band {
    min: u32,
    max: u32,
    name: String,
}

impl Band {
    fn new(min: u32, max: u32, name: &str) -> Self {
        Self {
            min,
            max,
            name: name.to_string(),
        }
    }
}

fn main() {
    let bands = [
        Band::new(1800000, 2000000, "160 Meters"),
        Band::new(3500000, 4000000, "80 Meters"),
        Band::new(7000000, 7300000, "40 Meters"),
        Band::new(14000000, 14300000, "20 Meters"),
        Band::new(18068000, 18168000, "17 Meters"),
        Band::new(21000000, 21450000, "15 Meters"),
        Band::new(24890000, 24990000, "12 Meters"),
        Band::new(28000000, 29700000, "10 Meters"),
    ];

    let freq: u32 = 24916000;

    let mut matched: Option<&Band> = None;
    for option in bands.iter() {
        if freq < option.min {
            break;
        }
        if freq < option.max {
            matched = Some(option);
            break;
        }
    }
    if let Some(band) = matched {
        println!("{} kHz is in {}", freq, band.name);
    } else {
        println!("{} kHz is out of band", freq);
    }
}