diff --git a/demos/01/ex.hpp b/demos/01/ex.hpp
new file mode 100644
index 0000000..2523b52
--- /dev/null
+++ b/demos/01/ex.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+extern double alt_in_cm;
+
+namespace afrl {
+  namespace cmasi {
+    class Location3D {
+    public:
+      double getAltitude() {
+        return 0.0;
+      }
+    };
+  }
+}
+
+void set_alt_in_cm(int p) {
+  alt_in_cm = p;
+}
+
+int get_value() {
+  int x;
+  return 42 + x;
+}