From 82ffbb8a316558e4c453251227aeeee33b50fb95 Mon Sep 17 00:00:00 2001
From: Marco Thomas <github@marcothms.de>
Date: Tue, 22 Apr 2025 09:17:30 +0900
Subject: [PATCH] fix: under/overflow

---
 src/main.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index e88cc82..e78bbd9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,8 +11,8 @@ fn interpret(code: &str) {
         match code_bytes[pc] as char {
             '>' => head += 1,
             '<' => head -= 1,
-            '+' => memory[head] += 1,
-            '-' => memory[head] -= 1,
+            '+' => memory[head] = memory[head].wrapping_add(1),
+            '-' => memory[head] = memory[head].wrapping_sub(1),
             '.' => println!("{}", memory[head]),
             ',' => {
                 let mut input_buf = [0u8; 1];