#ifndef STACK_H
#define STACK_H
#include <cstddef>   //for the data type size_t

class stack {
	static constexpr size_t n {100}; //maximum # of values that can be held
	int a[n];
	int *sp;          //The "stack pointer" points to the first currently
			  //unused element of the array.

public:
	stack();          //constructor
			  
	void push(int i); //Insert an int into the stack.
			  
	int pop();        //Remove an int (the most recently inserted one)
			  //from the stack.
};
#endif