#ifndef SUNXYSTACK_H
#define SUNXYSTACK_H
#define SMAX 200
template<class T>
class Stack
{public:
 Stack();
 Stack(int);
 ~Stack();
 T& Top();
 T& Pop();
 bool Push(T&);
 bool isEmpty();
 bool isFull();
 void Display();
 private:
 int top,size;
 T* array;
};
template<class T>
Stack<T>::Stack()
{
 this->Stack(SMAX);
}
template<class T>
Stack<T>::Stack(int s=SMAX)
{ if(s>SMAX||s<=0)
  size=s;
 else
  size=SMAX
 array=new T[size];
 top=0;
}
template<class T>
Stack<T>::~Stack()
{
 size=-1;top=0;
 delete[] array;
}
template<class T>
T& Stack<T>::Top()
{
        T& p=NULL;
 if(!this->isEmpty())
                p=array[top-1];
 return p;
}
template<class T>
T& Stack<T>::Pop()
{  
 T& p=NULL;
 if(!this->isEmpty())
        {
                top--;
                p=array[top];
        }
 return p;
}
template<class T>
bool Stack<T>::Push(T& entry)
{  
 bool sign;
        if(!this->isFull())
 {
                array[top]=entry;
                top++;
  sign=true;
 }
 else
  sign=false;
 return sign;
}
template<class T>
bool Stack<T>::isEmpty()
{
        if(top==0)
  return true;
 else
  return false;
}
template<class T>
bool Stack<T>::isFull()
{
 if(top==size+1)
  return true;
 else
  return false;
}
template<class T>
void Stack<T>::Display()
{
 //add codes here
}

#endif