a small no-dependancy program to count deaths since it was started.

death.rs

const DEATH_RATE_PER_YEAR:f64 = 8.1/1_000.0; //2020-2025

const WORLD_POPULATION:f64 = 7_800_000_000.0; //2020

const SECONDS_IN_YEAR: f64 = 365.25*86400.0; //10000BC-10000CE

fn main() {
	use std::time::Instant;
	use std::time::Duration;
	use std::thread::sleep;
	
    	let death_per_year = DEATH_RATE_PER_YEAR*WORLD_POPULATION;
	let deaths_per_second = death_per_year/SECONDS_IN_YEAR;
	
	let start = Instant::now();
	
	println!("deaths_per_year: {}",death_per_year);
	println!("seconds_in_year: {}",SECONDS_IN_YEAR);
	println!("deaths_per_second: {}",deaths_per_second);
	println!("\n--------------------------------[DEATH  COUNTER]--------------------------------\n");
	
	let mut lastdeaths:f64 = 0.0;
	
	loop {
		let seconds_after_start:f64 = (Instant::now().checked_duration_since(start).unwrap().as_micros() as f64)/1000_000.0;
		let deaths = seconds_after_start*deaths_per_second;
		let new_deaths = deaths-lastdeaths;
		if new_deaths>=1.0 {
			println!("deaths since start: {}",deaths as u64);
			lastdeaths = deaths;
		}
		sleep(Duration::new(0, 100_000_000));
	}
}