Question

用C#编写一个贪吃蛇的程序

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
BufferedGraphics BufferedGraphicsA = null;
BufferedGraphics BufferedGraphicsB = null;
private void Form1_Load(object sender, EventArgs e)
{
BufferedGraphicsContext context = BufferedGraphicsManager.Current;
BufferedGraphicsA = context.Allocate(this.CreateGraphics(), this.ClientRectangle);
BufferedGraphicsB = context.Allocate(BufferedGraphicsA.Graphics, this.ClientRectangle);
Pen pen = new Pen(Brushes.Blue,3);
for(int i = 0;i < 400;i += 20)
{
BufferedGraphicsB.Graphics.DrawLine(pen, new Po

int(0, i), new Point(400, i));
BufferedGraphicsB.Graphics.DrawLine(pen, new Point(i, 0), new Point(i, 400));
}
BufferedGraphicsB.Render();
food = this.GetPoint(random);
BufferedGraphicsA.Graphics.FillRectangle(Brushes.Yellow, new Rectangle(food, new Size(20, 20)));

BufferedGraphicsA.Render();
Point p = this.GetPoint(random);
PointList.Add(p);

}
List<Point> PointList = new List<Point>();
Point food = Point.Empty;
Random random = new Random(DateTime.Now.Millisecond);
Keys key = Keys.Left;
private void timer1_Tick(object sender, EventArgs e)
{

if (PointList.Count > 0)
{
Point first = PointList[0];
switch (key)
{
case Keys.Left:
first.X -= 20;
break;
case Keys.Right:
first.X += 20;
break;
case Keys.Up:
first.Y -= 20;
break;
case Keys.Down:
first.Y += 20;
break;
}
if (P

ointList.IndexOf(first, 0) >= 0)
{
this.timer1.Enabled = false;
MessageBox.Show("游戏结束");

}
BufferedGraphicsB.Render();
BufferedGraphicsA.Graphics.FillRectangle(Brushes.Yellow, new Rectangle(food, new Size(20, 20)));
PointList.Insert(0, first);
if (food != first)
PointList.RemoveAt(PointList.Count - 1);
else
{
food = this.GetPoint(random);
BufferedGraphicsA.Graphics.FillRectangle(Brushes.Yellow, new Rectangle(food, new Size(20, 20)));
}
foreach(Point p in PointList)
BufferedGraphicsA.Graphics.FillRectangle(Brushes.Red,new Rectangle(p,new Size(20,20)));

BufferedGraphicsA.Render();
}
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
key = e.KeyData;
}
private Point GetPoint(Random random)
{
int x = (random.Next(400) / 20) * 20;
int y = (random.Next(400) / 20)

* 20;
return new Point(x, y);
}

private void Form1_Paint(object sender, PaintEventArgs e)
{
BufferedGraphicsA.Render();
}

}
}