add day 10, part 2

day10/part2.rs

@@ -0,0 +1,37 @@
+// Copyright 2022 Christian Ulrich
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// usage: ./part2 < input
+
+pub mod common;
+
+use common::Processor;
+
+fn main() -> Result<(), &'static str> {
+    let mut processor = Processor::new();
+    let mut line = String::from("#");
+    for (count, register_x) in processor.cycles().enumerate() {
+        let sprite = register_x? - 1..=register_x? + 1;
+        match (count + 1) % 40 {
+            pos if { sprite.contains(&(pos as i64)) } => line.push('#'),
+            _ => line.push('.'),
+        }
+        if line.len() == 40 {
+            println!("{line}");
+            line.clear();
+        }
+    }
+    Ok(())
+}