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

#define MAX 10

int stackdata[MAX];
int 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;
}

void main()
{
	Push(7);
	Push(12);
	Push(23);
	Push(2);
	Push(33);
	Push(10);

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

}