最近比较希望能做一些敏捷开发的实践，昨晚向Nick Wang请教了一下，结合自己的体会，感觉应当从单元测试开始入手，逐步了解XP的相关内容。Nick刚刚出了个小题目，感觉这是学习TDD的一个好机会。
今天看到麒麟.NET的一个非TDD实现，一时手痒也尝试了一下。由于我没有玩过那个游戏，写完后才发现有问题，就偷懒把麒麟.NET生成随机数的方法给“借”了过来。
namespace GuessGame
{
public class GuessGame
{
public static readonly int NUMBER_COUNT = 4;
private int[] answers = null;
private int rightNumberCount;
private int wrongNumberCount;
private int wrongPositionCount;
public GuessGame()
{
Init();
GenerateDistinctRandomNumbers();
}
private void Init()
{
rightNumberCount = 0;
wrongNumberCount = 0;
wrongPositionCount = 0;
}
private void Reset()
{
Init();
}
private void GenerateDistinctRandomNumbers()
{
answers = new int[NUMBER_COUNT];
Random random = new Random();
bool allowZero = true;
for (int i = 0; i < NUMBER_COUNT; i++)
{
int n = random.Next(10);
if (n == 0 && allowZero)
{
answers[i] = n;
allowZero = false;
}
else
{
while (answers.Contains(n))
{
n = random.Next(10);
}
answers[i] = n;
}
}
}
public bool IsRight
{
get
{
return (rightNumberCount == NUMBER_COUNT);
}
}
public string Result
{
get
{
return string.Format("{0}A{1}B", rightNumberCount, wrongPositionCount);
}
}
public void Calculate(int[] inputs)
{
if (inputs == null || inputs.Length != NUMBER_COUNT)
{
throw new Exception("Invalid inputs.");
}
Reset();
for (int i = 0; i < NUMBER_COUNT; i++)
{
int index = Array.IndexOf(answers, inputs[i]);
if (index < 0)
{
wrongNumberCount++;
}
else if (index != i)
{
wrongPositionCount++;
}
else
{
rightNumberCount++;
}
}
}
}
class Program
{
private static readonly int GUESS_TIME = 6;
static void Main(string[] args)
{
PlayGuessGame();
Console.ReadLine();
}
private static void PlayGuessGame()
{
int[] inputs = null;
GuessGame game = new GuessGame();
int i = 1;
while (i <= GUESS_TIME)
{
inputs = GetInput();
game.Calculate(inputs);
Console.WriteLine(game.Result);
if (game.IsRight)
{
Console.WriteLine("Congratulations!");
break;
}
i++;
}
if (!game.IsRight)
{
Console.WriteLine("i think you are not very clever
");}
}
private static int[] GetInput()
{
int numberCount = GuessGame.NUMBER_COUNT;
int[] inputs = new int[numberCount];
Console.WriteLine("Input {0} numbers: ", numberCount);
for (int i = 0; i < numberCount; i++)
{
Console.Write(" number {0}: ", i + 1);
inputs[i] = Convert.ToInt32(Console.ReadLine());
}
return inputs;
}
}
}
完成这些代码的过程采用了我在编写自文档化的代码介绍的方法，即从伪代码开始，期望写出比较具有可读性的代码。发现写这样的小程序还是不错的:)
本文转自一个程序员的自省博客园博客，原文链接：http://www.cnblogs.com/anderslly/archive/2009/07/08/guess-game-without-tdd.html，如需转载请自行联系原作者。
