1.用C#編輯出來一個小遊戲，和小時玩的拼圖遊戲有些類似，還是蠻有趣得到，來和大家分享一下。
2.該十五字遊戲下面有三個按鈕，作用分別為：亂序：打亂上面十五個數字的順序；提交：當你把遊戲恢復到原位後，點提交按鈕，會判斷你的順序對不對，若是正確的，出現“你真棒”字樣，若不正確，不會出現；排序:自動把十五個數字順序排好。
3.程式程式碼如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 十五字遊戲
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        const int N = 4;
        Button [,] buttons = new Button[N,N];


        private void Form1_Load(object sender, EventArgs e)
        {
            //產生所有按鈕
            GenerateAllButtons();
        }
        void  GenerateAllButtons()
        {
            int x0 = 100, y0 = 50, w = 45, d = 50;
            for (int i=0;i<N;i++)
            {
                for (int j = 0; j < N; j++)
                {
                    int number = i * N + j;
                    Button btn = new Button();
                    btn.Text = (number+1).ToString();
                    btn.Top = y0 + i*d;
                    btn.Left = x0 + j*d;
                    btn.Width = w;
                    btn.Height = w;
                    btn.Tag = i * N + j;
                    btn.Visible = true;
                    buttons[i, j] = btn;

                    //註冊事件
                    btn.Click += new EventHandler(btn_Click);

                    this.Controls.Add(btn);
                }
            }
            buttons[N - 1, N - 1].Visible = false;

        }
        void btn_Click(Object sender, EventArgs e)
        {
            Button btn = sender as Button;
            Button blank = FindHiddenButton();
            //判斷是否相鄰
            if (IsNeighbor(btn, blank))
            {
                Swap(btn, blank);
                blank.Focus();
            }
        }

        //交換兩個按鈕
        void Swap(Button btna,Button btnb)
        {
            string s = btna.Text;
            btna.Text = btnb.Text;
            btnb.Text = s;

            bool b = btna.Visible;
            btna.Visible = btnb.Visible;
            btnb.Visible = b;
        }
        //判斷是否相鄰的函式
        bool IsNeighbor(Button btn,Button blank)
        {
            int a = (int)btn.Tag;
            int b = (int)blank.Tag;
            int c1 = a / N; int d1 = a % N;
            int c2 = b / N;int d2 = b % N;
            if ((c1 == c2 && ((d1 == d2 - 1) || (d1 == d2 + 1)))||(d1==d2&&((c1==c2-1)||(c1==c2+1))))
            {
                return true;
            }
            return false;
        }

        Button  FindHiddenButton()
        {
            for(int i=0;i<N;i++)
            {
                for(int j=0;j<N;j++)
                {
                    if (buttons[i, j].Visible == false)
                    {
                        return buttons[i, j];
                    }
                }

            }
            return null;
        }
        private void button3_Click(object sender, EventArgs e)
        {
            //點選後自動排序
            Sort();
            GenerateAllButtons();
        }
        void Sort()
        {
            Button btn = new Button();
            btn.Visible = false;
            for(int i=0;i<N;i++)
            {
                for(int j=0;j<N;j++)
                {
                    buttons[i, j].Visible  = btn.Visible ;
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //點選後隨機亂序
            Shuffle();
        }
        void Shuffle()
        {
            //多次交換兩個按鈕
            Random r = new Random();
            for(int i=0;i<100;i++)
            {
                int a = r.Next(N);
                int b = r.Next(N);
                int c = r.Next(N);
                int d = r.Next(N);
                Swap(buttons[a, b], buttons[c, d]);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //判斷是否找回正確順序
            if(ResultIsOk())
            {
                MessageBox.Show("你真棒");
            }
        }
        bool ResultIsOk()
        {
            for(int i=0;i<N;i++)
            {
                for (int j = 0; j < N; j++)
                {
                    if (int.Parse(buttons[i, j].Text) != (i*N+j+1))
                    {
                        return false;
                    }
                }
            }
            return true ;
        }
    }
}