///////    ArbStack.h    ///////

//    generic stack derived from generic list

#include <iostream.h>
#include "../arblist/ArbList.h"

class ArbStack : private ArbList    // keyword private is optional
{  public:
     ArbStack() { }                 // default constructor
     ArbStack(Arbent z);            // constructor
     int push(Arbent z);
     Arbent pop();
     ArbList::is_empty;             // make is_empty visible
};

inline int ArbStack::push(Arbent z)
       {    return put_on(z);   }

inline ArbStack::ArbStack(Arbent z)
       {    put_on(z);   }