From 229c8e3b8c12eb5b5c29f85e9206c43c30faab1d Mon Sep 17 00:00:00 2001
From: xingchen <1098756313@qq.com>
Date: Fri, 25 Sep 2026 11:05:33 +0800
Subject: [PATCH] test: add cpp/filter.cpp source fixture

---
 cpp/filter.cpp | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 cpp/filter.cpp

diff --git a/cpp/filter.cpp b/cpp/filter.cpp
new file mode 100644
index 0000000..1a0dc10
--- /dev/null
+++ b/cpp/filter.cpp
@@ -0,0 +1,4 @@
+int smooth_sample(int current, int previous) {
+    if (current > previous) return (current + previous) / 2;
+    return current;
+}