/**
 * File: stack.cs
 * Created Time: 2022-12-23
 * Author: haptear (haptear@hotmail.com)
 */

using NUnit.Framework;

namespace hello_algo.chapter_stack_and_queue;

public class stack
{
    [Test]
    public void Test()
    {
        /* 初始化栈 */
        Stack<int> stack = new();

        /* 元素入栈 */
        stack.Push(1);
        stack.Push(3);
        stack.Push(2);
        stack.Push(5);
        stack.Push(4);
        // 请注意，stack.ToArray() 得到的是倒序序列，即索引 0 为栈顶
        Console.WriteLine("栈 stack = " + string.Join(",", stack));

        /* 访问栈顶元素 */
        int peek = stack.Peek();
        Console.WriteLine("栈顶元素 peek = " + peek);

        /* 元素出栈 */
        int pop = stack.Pop();
        Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + string.Join(",", stack));

        /* 获取栈的长度 */
        int size = stack.Count();
        Console.WriteLine("栈的长度 size = " + size);

        /* 判断是否为空 */
        bool isEmpty = stack.Count() == 0;
        Console.WriteLine("栈是否为空 = " + isEmpty);
    }
}