Got past temporary variable deallocation bug. Now working on functions.

runtime/runtime.h

@@ -14,9 +14,24 @@ enum STATES:unsigned int
 {
     EXIT,
     UNDEFINED_STATE_ERROR,
+    STACK_UNDERFLOW_ERROR,
     START
 };
 
+class subroutine
+{
+    struct subroutine *called;
+    enum STATES ret;
+
+public:
+    static enum STATES close();
+    subroutine(enum STATES r);
+    virtual ~subroutine()
+    {}
+};
+
+extern struct subroutine *callStack;
+
 /* function prototype */
 unsigned int run();