init

2023/day1/p1/main.rs

@@ -0,0 +1,41 @@
+use std::fs;
+
+fn main()
+{
+    let file_path: &str = "./input.text";
+
+    let contents = fs::read_to_string(file_path)
+        .unwrap();
+
+    let mut sum:i32 = 0;
+
+    for line in contents.lines()
+    {
+        println!("{line}");
+
+        let mut first: u32 = 10;
+        let mut last: u32 = 0;
+
+        for character in line.chars()
+        {
+            if character.is_ascii_digit()
+            {
+                let value = character.to_digit(10).unwrap();
+                if first == 10
+                {
+                    first = value;
+                }
+                last = value;
+            }
+        }
+
+        let result = first.to_string() + &last.to_string();
+
+        println!("Sum of line {result}.");
+
+        sum += result.parse::<i32>().unwrap();
+
+    }
+
+    println!("Sum: {sum}");
+}