using anyhow::Result

src/bin/1.rs

@@ -36,9 +36,10 @@ Of course, your expense report is much larger. Find the two entries that sum to
 do you get if you multiply them together?
 */
 
-use std::{fs::{File}, io};
+use std::fs::{File};
 use std::collections::HashSet;
 use std::io::{BufRead, BufReader};
+use anyhow::Result;
 
 fn find_triple(target: i32, list: &Vec<i32>, set: &HashSet<i32>) -> i32 {
     for i in list {
@@ -63,7 +64,8 @@ fn find_pair(target: i32, list: &Vec<i32>, set: &HashSet<i32>) -> i32 {
     0
 }
 
-fn main() -> io::Result<()> {
+fn main() -> Result<()> {
+    //let contents = fs::read_to_string("1.input").expect("Couldn't read \"1.input\"");
     let file = File::open("1.input")?;
     let reader = BufReader::new(file);
 
@@ -71,7 +73,7 @@ fn main() -> io::Result<()> {
     let mut set: HashSet<i32> = HashSet::new();
 
     for line in reader.lines() {
-        let value = line.unwrap().parse::<i32>().unwrap();
+        let value = line?.parse::<i32>()?;
         list.push(value);
         set.insert(value);
     }

src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}