2022 day 1. Learning rust!

2022/day01/src/main.rs

@@ -0,0 +1,26 @@
+use std::io;
+use std::io::prelude::*;
+use std::fs::File;
+
+fn read_lines(filename: &str) -> io::Result<io::Lines<io::BufReader<File>>> {
+    let file = File::open(filename)?;
+    Ok(io::BufReader::new(file).lines())
+}
+
+fn main() {
+    let mut max = 0;
+    let mut current = 0;
+
+    for line in read_lines("input.txt").unwrap() {
+        let text = line.unwrap();
+        current = match text.parse::<i32>() {
+            Ok(value) => current + value,
+            Err(_) => {
+                if current > max { max = current; }
+                0
+            },
+        };
+    }
+
+    println!("{}", max);
+}