Better version

src/lib.rs

@@ -0,0 +1 @@
+pub mod prob1;

src/main.rs

@@ -1,21 +1,10 @@
+use _1_calorie_counting::prob1::solve;
+
 fn main() {
     let args: Vec<String> = std::env::args().collect();
     let file_path = args
         .get(1)
         .expect("Please provide an argument on command-line.");
-    let contents =
-        std::fs::read_to_string(file_path).expect("Please provide a text file as an argument.");
-    let lines: Vec<&str> = contents.split("\n").collect();
-
-    let mut max = 0;
-    let mut accumulated = 0;
-    lines.iter().for_each(|number| {
-        if let Ok(yay) = number.parse::<i32>() {
-            accumulated += yay;
-        } else {
-            max = max.max(accumulated);
-            accumulated = 0;
-        }
-    });
+    let max = solve(file_path);
     println!("{max}");
 }

src/prob1/mod.rs

@@ -0,0 +1,17 @@
+pub fn solve(file_path: &str) -> i32 {
+    let contents =
+        std::fs::read_to_string(file_path).expect("Please provide a text file as an argument.");
+    let lines: Vec<&str> = contents.split("\n").collect();
+
+    let mut max = 0;
+    let mut accumulated = 0;
+    lines.iter().for_each(|number| {
+        if let Ok(yay) = number.parse::<i32>() {
+            accumulated += yay;
+        } else {
+            max = max.max(accumulated);
+            accumulated = 0;
+        }
+    });
+    max
+}