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88 lines
1.6 KiB
88 lines
1.6 KiB
use std::fmt::{self, Display, Formatter};
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struct City {
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name: &'static str,
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lat: f32,
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lon: f32,
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}
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impl Display for City {
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fn fmt(&self, f: &mut Formatter) -> fmt::Result {
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let lat_c = if self.lat >= 0.0 { 'N' } else { 'S' };
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let lon_c = if self.lon >= 0.0 { 'E' } else { 'W' };
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write!(
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f,
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"{}: {:.3}°{} {:.3}°{}",
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self.name,
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self.lat.abs(),
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lat_c,
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self.lon.abs(),
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lon_c
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)
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}
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}
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#[derive(Debug)]
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struct Color {
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red: u8,
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green: u8,
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blue: u8,
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}
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impl Display for Color {
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fn fmt(&self, f: &mut Formatter) -> fmt::Result {
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write!(
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f,
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"RGB ({}, {}, {}) 0x{:02X}{:02X}{:02X}",
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self.red, self.green, self.blue, self.red, self.green, self.blue
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)
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}
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}
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fn main() {
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for city in [
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City {
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name: "Dublin",
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lat: 53.347778,
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lon: -6.259722,
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},
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City {
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name: "Oslo",
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lat: 59.95,
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lon: 10.75,
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},
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City {
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name: "Vancouver",
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lat: 49.25,
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lon: -123.1,
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},
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]
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.iter()
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{
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println!("{}", *city);
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}
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for color in [
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Color {
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red: 128,
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green: 255,
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blue: 90,
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},
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Color {
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red: 0,
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green: 3,
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blue: 254,
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},
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Color {
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red: 0,
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green: 0,
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blue: 0,
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},
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]
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.iter()
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{
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println!("{}", *color);
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}
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}
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