stack.h

包括图、二叉树、链表

#ifndef STACK_H_
#define STACK_H_
enum Error_code{success,underflow,overflow};
typedef int Stack_entry;
const int maxstack =3;  
class Stack {
public:
   Stack();
   bool empty() const;
   Error_code pop();
   Error_code top(Stack_entry &item) const;
   Error_code push(const Stack_entry &item);
   void clear(); 
   bool full() const ; 
   int size() const;  
private:
   int count;
   Stack_entry entry[maxstack];
};
#endif