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 ShiWuZhiGame 
{ 
  public partial class Form1 : Form 
  { 
    public Form1() 
    { 
      InitializeComponent(); 
    } 
 
    const int N = 4; //按鈕的行、列數(shù) 
    Button[,] buttons = new Button[N, N]; //按鈕的數(shù)組 
 
    private void Form1_Load(object sender, EventArgs e) 
    { 
      //產(chǎn)生所有按鈕 
      GenerateAllButtons(); 
    } 
    //打亂順序 
    void Shuffle() 
    { 
      //多次隨機(jī)交換兩個(gè)按鈕 
      Random rnd = new Random(); 
      for (int i = 0; i < 100; i++) 
      { 
        int a = rnd.Next(N); 
        int b = rnd.Next(N); 
        int c = rnd.Next(N); 
        int d = rnd.Next(N); 
        Swap(buttons[a, b], buttons[c, d]); 
      } 
    } 
 
    //生成所有的按鈕 
    void GenerateAllButtons() 
    { 
      int x0 = 100, y0 = 10, w = 45, d = 50; 
      for (int r = 0; r < N; r++) 
        for (int c = 0; c < N; c++) 
        { 
          int num = r * N + c; 
          Button btn = new Button(); 
          btn.Text = (num + 1).ToString(); 
          btn.Top = y0 + r * d; 
          btn.Left = x0 + c * d; 
          btn.Width = w; 
          btn.Height = w; 
          btn.Visible = true; 
          btn.Tag = r * N + c; //這個(gè)數(shù)據(jù)用來表示它所在行列位置 
 
          //注冊(cè)事件 
          btn.Click += new EventHandler(btn_Click); 
 
          buttons[r, c] = btn; //放到數(shù)組中 
          this.Controls.Add(btn); //加到界面上 
        } 
      buttons[N - 1, N - 1].Visible = false; //最后一個(gè)不可見 
    } 
 
    //交換兩個(gè)按鈕 
    void Swap(Button btna, Button btnb) 
    { 
      string t = btna.Text; 
      btna.Text = btnb.Text; 
      btnb.Text = t; 
 
      bool v = btna.Visible; 
      btna.Visible = btnb.Visible; 
      btnb.Visible = v; 
    } 
 
    //按鈕點(diǎn)擊事件處理 
    void btn_Click(object sender, EventArgs e) 
    { 
      Button btn = sender as Button; //當(dāng)前點(diǎn)中的按鈕 
      Button blank = FindHiddenButton(); //空白按鈕 
 
      //判斷是否與空白塊相鄰，如果是，則交換 
      if (IsNeighbor(btn, blank)) 
      { 
        Swap(btn, blank); 
        blank.Focus(); 
      } 
 
      //判斷是否完成了 
      if (ResultIsOk()) 
      { 
        MessageBox.Show("ok"); 
      } 
    } 
 
    //查找要隱藏的按鈕 
    Button FindHiddenButton() 
    { 
      for (int r = 0; r < N; r++) 
        for (int c = 0; c < N; c++) 
        { 
          if (!buttons[r, c].Visible) 
          { 
            return buttons[r, c]; 
          } 
        } 
      return null; 
    } 
 
    //判斷是否相鄰 
    bool IsNeighbor(Button btnA, Button btnB) 
    { 
      int a = (int)btnA.Tag; //Tag中記錄是行列位置 
      int b = (int)btnB.Tag; 
      int r1 = a / N, c1 = a % N; 
      int r2 = b / N, c2 = b % N; 
 
      if (r1 == r2 && (c1 == c2 - 1 || c1 == c2 + 1) //左右相鄰 
        || c1 == c2 && (r1 == r2 - 1 || r1 == r2 + 1)) 
        return true; 
      return false; 
    } 
 
    //檢查是否完成 
    bool ResultIsOk() 
    { 
      for (int r = 0; r < N; r++) 
        for (int c = 0; c < N; c++) 
        { 
          if (buttons[r, c].Text != (r * N + c + 1).ToString()) 
          { 
            return false; 
          } 
        } 
      return true; 
    } 
 
    private void button1_Click_1(object sender, EventArgs e) 
    { 
      //打亂順序 
      Shuffle(); 
    } 
  } 
}