
#include <stdio.h>

#define STACK_SIZE 10

static node stack[STACK_SIZE];
static size_t stack_ptr = 0;

void push(node n)
{
	if (stack_ptr == STACK_SIZE)
		printf("Stack is full\n");
	else
		stack[stack_ptr++] = n;
}

node pop(void)
{
	static node error_node = {Error, 0};

	if (stack_ptr == 0)
		return error_node;
	else
		return stack[--stack_ptr];
}

