// Homework 30, challenge: Stack with a guard. This file is finished. Finish
// stack/stack.go.
//
// Run from this folder:
//   cd exercises/30/homework/04-stack
//   go run .

package main

import (
	"fmt"

	"stackmodule/stack"
)

func main() {
	s := stack.New()
	s.Push("a")
	s.Push("b")
	fmt.Println(s.Size())

	for i := 0; i < 3; i++ {
		top, err := s.Pop()
		if err != nil {
			fmt.Println("Error:", err)
			continue
		}
		fmt.Println(top)
	}

	fmt.Println(s.Size())
}