added clang format
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..43301e1
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,5 @@
+---
+Language:     Cpp
+BasedOnStyle: Google
+ColumnLimit:  120
+SortIncludes: false