#include <stdio.h>
#include <stdlib.h>

class Stack
{
	#define MAX 10
	int stackdata[MAX];
	int top;
public:
	Stack()
	{
		top=-1;
	}
	int Push(int what)
	{
		if (top<MAX-1)
		{
			top++;
			stackdata[top]=what;
			return 1;
		}
		return -1;
	}
	int Pop()
	{
		int r;
		if (top>-1)
		{
			r=stackdata[top];
			stackdata[top]=0;
			top--;
			return r;
		}
		return -1;
	}
	bool isempty()
	{
		if (top==-1)
			return true;
		return false;
	}
	bool isfull()
	{
		if (top==MAX-1)
			return true;
		else
			return false;
	}
	int gettop()
	{
		return stackdata[top];
	}
};

void main()
{
	Stack s1,s2;

	s1.Push(33);
	s1.Push(23);
	s1.Push(13);

	s2.Push(5);
	s2.Push(6);

	printf("s1 pop = %d\n",s1.Pop());
	printf("s1 pop = %d\n",s1.Pop());

	printf("s2 pop = %d\n",s2.Pop());
}