diff --git a/.gitignore b/.gitignore
index 3e029b1..cd75ff1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /c2
+/.idea/*
+!/.idea/c_cpp_properties.json
diff --git a/.idea/c_cpp_properties.json b/.idea/c_cpp_properties.json
new file mode 100644
index 0000000..39f4415
--- /dev/null
+++ b/.idea/c_cpp_properties.json
@@ -0,0 +1,12 @@
+{
+    "configurations": [
+        {
+            "name": "CLion",
+            "includePath": [
+                "${workspaceFolder}/v0/*"
+            ],
+            "cStandard": "c89",
+        }
+    ],
+    "version": 4
+}