在C＃中需要帮助Hangman游戏 [英] Need help with Hangman game in C#

问题描述

您好，



我正在尝试制作一个刽子手游戏，除了主要部分我几乎完成了它。当用户单击包含字母表的按钮时，如何在空白部分上显示该特定文本。



------------- -------------------------------------------------- ----------------

这是一个例子：



C_DE_R_JE_T ----- > CODEPROJECT



因此，当用户点击包含字母O的按钮时，我需要在第1和第7中用'O'替换'_'位置。



但是当我搜索点击按钮字母的索引时，它的索引只有1O。



如何解决？



在此先感谢.......

Hello,

I am trying to make a hangman game and I've almost completed it except the main part. When a user clicks a button containing an alphabet, how to show that specific text on the blank part.

-------------------------------------------------------------------------------
Here's an example:

C_DE_R_JE_T ----->CODEPROJECT

so, when the user clicks the button containing the letter "O" I need to replace the '_' with 'O' in both 1st and 7th position.

But when I search for the index of the clicked button's letter it gave index of only 1 "O".

How can I solve it ?

Thanks in Advance.......

推荐答案

有几种方法可以找到所有索引。最简单的解决方案可能只是当前代码的扩展：

There are a couple of ways to find all indexes. The easiest solution is probably just an extension of your current code:

string matchString = "CODEPROJECT";
char lookFor = 'O';
int index = 0;
foreach (char c in matchString)
    {
    if (c == lookFor)
        {
        // index is the index of the char you are looking for
        }
    index++;
    }

还有其他方法：

There are other ways:

string matchString = "CODEPROJECT";
char lookFor = 'O';
int index = matchString.IndexOf(lookFor);
while (index >= 0)
    {
    Console.WriteLine(index);
    index = matchString.IndexOf(lookFor, index + 1);
    }

或：

Or:

string matchString = "CODEPROJECT";
char lookFor = 'O';
var indexes = matchString.Select((c, i) => new { c, i }).Where(x => x.c == lookFor).Select(x => x.i);

但它们更高级！

因为Hangman中使用的字符串对于游戏的一个会话是一个常量，我会在游戏开始之前计算所有索引：

Since the string used in Hangman is a constant for one session of the game, I would calculate all the indexes before the game started:

private Dictionary<char, List<int>> CharIndexes(string text)
{
    text = text.ToLower();

    var dctCToNdx = new Dictionary<char, List<int>>();

    for (int i = 0; i < text.Length; i++)
    {
        char c = text[i];

        if (! dctCToNdx.ContainsKey(c)) dctCToNdx[c] = new List<int>();

        dctCToNdx[c].Add(i);
    }

    return dctCToNdx;
}</int>

这里我使用了一个Dictionary来匹配每个char以及字符串中的索引列表。



所以，在游戏，当用户猜出一个角色时：

Here I've used a Dictionary to match each char with a list of its indexes in the string.

So, in the game, when the user guesses a character:

string gameString = "CodeProject";

string hangString = new String('-', gameString.Length);

var hangDictionary = CharsToIndexes("CodeProject");

string guess = "C";

char guessChar = guess.ToLower()[0];

List<int> theIndexes = null;

if (hangDictionary.TryGetValue(guessChar, out theIndexes))
{
    foreach (int ndx in theIndexes)
    {
        // left for you to write
    }
}</int>

在您编写的代码中感兴趣的地方是当您需要时，当您猜到C时出现大写C在hangString中的正确位置，并且小写c也出现在正确的位置。



面临的挑战是.NET C＃没有为String提供'ReplaceAt运算符。



提示：您可以使用'Char.IsLower（char）来确定是否有字符字符串是小写的。

Where it gets interesting in the code left for you to write is when you require that when you get a guess of "C" that an upper-case "C" appears in the right place in the "hangString," and that a lower-case "c" also appears in the correct place.

The challenge there is that .NET C# does not provide a 'ReplaceAt operator for String.

Hint: you can use 'Char.IsLower(char) to determine if a character in a string is lower-case.

使用正则表达式查找索引的另一种方法

Another approach using a Regular Expression to find the indexes

string hiddenWord = "CODEPROJECT";
char[] foundLetters = "C_DE_R_JE_T".ToArray();
char testChar = 'O';
foreach (Match m in Regex.Matches(hiddenWord, testChar.ToString(), RegexOptions.IgnoreCase))
{
     foundLetters[m.Index] = testChar;
}

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