GUI绘图，
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading;using System.Windows.Forms;namespace Snake{public partial class Yard : Form{public Yard(){InitializeComponent();}private void Yard_Load(object sender, EventArgs e){this.Size = new Size(ROWS * BLOCK_SIZE, COLS * BLOCK_SIZE);timer1.Start();lblScore.Text = "Score:" Yard.Score;}Snake s = new Snake();Egg egg = new Egg(15, 15);private static int _score = 0;public static int Score{get { return Yard._score; }set { Yard._score = value; }}public static int BLOCK_SIZE = 20;public static int ROWS = 30;public static int COLS = 30;private void timer1_Tick(object sender, EventArgs e){if (lblGameOver.Visible == false){s.paint(this);egg.draw(this);}else{if (count > 5 - 1){timer1.Stop();Thread.Sleep(10 * 100);timer1.Start();lblGameOver.Text = "得分清零";count = 0;}}if (s.getcol() == egg.col && s.getrow() == egg.row){s.eat();Yard.Score = 5;lblScore.Text = "Score :" Yard.Score.ToString();egg.reinitial();}}bool flag = false;int count = 0;private void Yard_KeyPress(object sender, KeyPressEventArgs e){if (e.KeyChar == (char)Keys.W || e.KeyChar == (char)Keys.W 32){s.keypressed("w");}else if (e.KeyChar == (char)Keys.S || e.KeyChar == (char)Keys.S 32){s.keypressed("s");}else if (e.KeyChar == (char)Keys.A || e.KeyChar == (char)Keys.A 32){s.keypressed("a");}else if (e.KeyChar == (char)Keys.D || e.KeyChar == (char)Keys.D 32){s.keypressed("d");}else if (e.KeyChar == (char)Keys.K || e.KeyChar == (char)Keys.K 32){if (lblGameOver.Visible == false){DialogResult resust = MessageBox.Show("是否保留上次最后死亡痕迹?", "有意思!", MessageBoxButtons.YesNo, MessageBoxIcon.Question);if (resust == DialogResult.No){s.clear();count ;lblGameOver.Visible = false;s = new Snake();}else{count ;lblGameOver.Visible = false;s = new Snake();}}else{count ;lblGameOver.Visible = false;s = new Snake();}}else if (e.KeyChar == (char)Keys.P || e.KeyChar == (char)Keys.P 32){if (flag == false){timer1.Stop();flag = true;}else{timer1.Start();flag = false;}}}}public class Snake{Node head;Node tail;int size = 1;Yard y;int count = 0;public void paint(Yard y){if (size == 0){return;}if (count == 0){this.y = y;Node n = new Node(20, 22, Dir.L, y);this.head = n;this.tail = n;head.next = tail;head.prev = head;tail.prev = head;tail.next = tail;count ;}else{if (size == 0){return;}move();draw();}}void draw(){for (Node node = head; node != null; node = node.next){node.paint();}//AddToHead();}public void eat(){AddToHead();size ;}public int getrow(){if (size == 0){return -1;}return head.row;}public int getcol(){if (size == 0){return -1;}return head.col;}public void keypressed(string s){if (size == 0){return;}switch (s){case "w":if (head.dir != Dir.D){head.dir = Dir.U;}break;case "s":if (head.dir != Dir.U){head.dir = Dir.D;}break;case "a":if (head.dir != Dir.R){head.dir = Dir.L;}break;case "d":if (head.dir != Dir.L){head.dir = Dir.R;}break;default:break;}}private void AddToHead(){Node n;switch (head.dir){case Dir.R:n = new Node(head.row 1, head.col, head.dir, head.y);n.next = head;head.prev = n;head = n;break;case Dir.L:n = new Node(head.row - 1, head.col, head.dir, head.y);n.next = head;head.prev = n;head = n;break;case Dir.U:n = new Node(head.row, head.col - 1, head.dir, head.y);n.next = head;head.prev = n;head = n;break;case Dir.D:n = new Node(head.row, head.col 1, head.dir, head.y);n.next = head;head.prev = n;head = n;break;}}public void move(){AddToHead();DeleteFromTail();checkDead();}private void DeleteFromTail(){tail = tail.prev;tail.y.Controls.Remove(tail.next.N);tail.next = null;}void checkDead(){if (size == 0){return;}if (head.row < 0 || head.col < 0 || head.col >= Yard.COLS - 2 || head.row >= Yard.ROWS - 1){y.lblGameOver.Visible = true;clear();}if (size == 0){return;}for (Node n = head.next; n != null; n = n.next){if (n.row == head.row && n.col == head.col){y.lblGameOver.Visible = true;clear();}}}public void clear(){if (size==0){return;}while (tail.prev != null){tail = tail.prev;tail.next.y.Controls.Remove(tail.next.N);tail.next = null;size--;}head.y.Controls.Remove(head.N);head = null;size--;}private class Node{public Label N = new Label();public int row;public int col;public Dir dir;public Node next;public Node prev;public Yard y;public Node(int row, int col, Dir dir, Yard y){this.row = row;this.col = col;this.dir = dir;this.y = y;}public void paint(){N.Text = "█";N.BackColor = Color.Transparent;N.Location = new Point(this.row * Yard.BLOCK_SIZE, this.col * Yard.BLOCK_SIZE);N.Size = new Size(Yard.BLOCK_SIZE, Yard.BLOCK_SIZE);y.Controls.Add(N);}public void move(){N.Location = new Point(1000, 1000);}}}public class Egg{public Label N = new Label();public int row, col;public Yard y;public Egg(int row, int col){this.row = row;this.col = col;}public void draw(Yard y){N.Text = "●";N.BackColor = Color.Transparent;this.y = y;if (N.ForeColor == Color.Green){N.ForeColor = Color.Red;}else{N.ForeColor = Color.Green;}N.Location = new Point(this.row * Yard.BLOCK_SIZE, this.col * Yard.BLOCK_SIZE);N.Size = new Size(Yard.BLOCK_SIZE, Yard.BLOCK_SIZE);this.y.Controls.Add(N);}Random r = new Random();public void reinitial(){this.row = r.Next(2, 27);this.col = r.Next(2, 27);}}enum Dir{D, U, L, R}}
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