There be many a land lubber that knows naught of the pirate ways and gives direction by degree!
They know not how to box the compass!



Task description

 Create a function that takes a heading in degrees and returns the correct 32-point compass heading.
 Use the function to print and display a table of Index, Compass point, and Degree; rather like the corresponding columns from, the first table of the wikipedia article, but use only the following 33 headings as input:
[0.0, 16.87, 16.88, 33.75, 50.62, 50.63, 67.5, 84.37, 84.38, 101.25, 118.12, 118.13, 135.0, 151.87, 151.88, 168.75, 185.62, 185.63, 202.5, 219.37, 219.38, 236.25, 253.12, 253.13, 270.0, 286.87, 286.88, 303.75, 320.62, 320.63, 337.5, 354.37, 354.38]. (They should give the same order of points but are spread throughout the ranges of acceptance).


Notes;
 The headings and indices can be calculated from this pseudocode:
for i in 0..32 inclusive:
    heading = i * 11.25
    case i %3:
      if 1: heading += 5.62; break
      if 2: heading -= 5.62; break
    end
    index = ( i mod 32) + 1
 The column of indices can be thought of as an enumeration of the thirty two cardinal points (see talk page)..


fn expand(cp: &str) -> String {
    let mut out = String::new();
    for c in cp.chars() {
        out.push_str(match c {
            'N' => "north",
            'E' => "east",
            'S' => "south",
            'W' => "west",
            'b' => " by ",
            _ => "-",
        });
    }
    out
}
 
fn main() {
    let cp = [
        "N", "NbE", "N-NE", "NEbN", "NE", "NEbE", "E-NE", "EbN",
        "E", "EbS", "E-SE", "SEbE", "SE", "SEbS", "S-SE", "SbE",
        "S", "SbW", "S-SW", "SWbS", "SW", "SWbW", "W-SW", "WbS",
        "W", "WbN", "W-NW", "NWbW", "NW", "NWbN", "N-NW", "NbW"
    ];
    println!("Index  Degrees  Compass point");
    println!("-----  -------  -------------");
    for i in 0..=32 {
        let index = i % 32;
        let heading = i as f32 * 11.25
            + match i % 3 {
                1 => 5.62,
                2 => -5.62,
                _ => 0.0,
            };
        println!(
            "{:2}     {:6.2}   {}",
            index + 1,
            heading,
            expand(cp[index])
        );
    }
}