31

src/u13.rs

@@ -1 +1,21 @@
-pub fn main() {}
+pub fn main() {
+    println!("1. mtokm");
+    println!("2. kmtom");
+    let mut input = String::new();
+    std::io::stdin().read_line(&mut input).unwrap();
+    match input.trim() {
+        "1." | "1" | "mtokm" => read_and_convert(|u| {u * 1.609344}),
+        "2." | "2" | "kmtom" => read_and_convert(|u| {u / 1.609344}),
+        _ => {}
+    }
+}
+
+fn read_and_convert<F>(tom: F)
+where F: Fn(f64) -> f64
+{
+    println!("zadaj udaj");
+    let mut input = String::new();
+    std::io::stdin().read_line(&mut input).unwrap();
+    let unit: f64 = input.trim().parse().unwrap();
+    println!("{}", tom(unit));
+}