#include <iostream>

using namespace std;



// intstack.h

#ifndef intstack_h // this avoids multiple inclusion of this file into the 

#define intstack_h // same file, i.e. another file doing 2 includes of this

                   // file. (always do this for header files)

                   // this is closed by the #endif at the end



// this is the class definition for intstack

// this creates a stack implemented as an integer array



class intstack {



private: // private variables/functions can't be changed/looked at by users

	   // private member variables 

	int thetop; // top of the stack

	int *a; // array od elements (the stack)

	int max; // maximum number of elements 

    

public: // public variables/functions can be changed/looked at by users)

   

	intstack();	    // constructor of class (called when object is created)

	intstack(int);  // another contructor 



      // declarations of public "member functions" or "methods"

	void push (int);  // pushes integer into stack

	int  pop();  // pops integer from stack

	int  size(); // returns the total size of stack

	int  top();  // returns thetop or the total size used by stack

	int  looktop(); // returns (without removing) the top element



	void print(ostream &);  // prints its content to an ostream (that can be cout)



}; 



#endif