update filenames

Assignment_3/lib/Stack.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "Node.h"
+
+class Stack {
+    protected:
+        std::string name;
+        Stack(std::string _name);
+        Node* first;
+    public:
+        bool push(int element);
+        bool pop(int element);
+        bool size(int element);
+        std::string print_stack();
+};