Add initial version

The software provides the delta distribution function implementation.

diff --git a/src/main.rs b/src/main.rs
new file mode 100644 (file)
index 0000000..949ac53
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,45 @@
+//! Copyright (C) 2023 Gustav Eek <gustav.eek@fripost.org>
+//!
+//! SPDX-License-Identifier: GPL-3.0-or-later
+
+use std::io; // bring flush() into scope with `use std::io::Write`
+use std::io::prelude::*; // Bring `std::io::BufRead` in scope
+
+fn input() -> Vec<String> {
+    // Consider datastructure some list of strings
+    let stdin = io::stdin();
+    let v = stdin.lock().lines().map(|x| x.unwrap()).collect();
+    v
+}
+
+fn output(prio: Vec<f64>, ranked: Vec<String>) {
+    for (p, l) in prio.iter().zip(ranked.iter()) {
+       println!("{:2.0} %\t{}", p * 100.0, l);
+    }
+}
+
+fn delta(n: i32) -> Vec<f64> {
+    let mut ret: Vec<f64> = Vec::new();
+    for _i in 0..n {
+       ret.push(1.0 / n as f64);
+    }
+    ret
+}
+
+fn main() {
+    let ranked: Vec<String> = input();
+    let num = ranked.len() as i32;
+    let prio = delta(num);
+    for p in prio.iter() {
+       eprint!("{} ", p);
+    }
+    eprintln!("");
+    for l in ranked.iter() {
+       eprint!("{} ", l);
+    }
+    eprintln!("");
+    eprintln!("That was {} items: {}", num, prio[0]);
+
+    output(prio, ranked);
+
+}