chore: update c, h, md files

.gitignore

@@ -0,0 +1,29 @@
+# Build
+build/
+*.o
+*.a
+*.so
+*.dylib
+
+# Binary
+loreg
+
+# Coverage
+*.gcov
+*.gcda
+*.gcno
+
+# Profiling
+gmon.out
+*.prof
+
+# Editor
+*~
+*.swp
+*.swo
+.vscode/
+.idea/
+
+# OS
+.DS_Store
+Thumbs.db