在hangman游戏（通过文本框输入）中只接受一封信VB.NET
[英]Only accepting a letter once during a hangman game (entered through a textbox) VB.NET
问题描述
I have to make a hangman game for a school project and one of the requirements is to only accept a letter once during gameplay. 
我必须为一个学校项目制作一个子手游戏，其中一项要求是在玩游戏时只接受一次字母。 I have allowed a user to guess the word by entering letters into a textbox and so I was just wondering if anyone knew how I could validate this? 我已经允许用户通过在文本框中输入字母来猜测单词，所以我只是想知道是否有人知道我可以对此进行验证？
2 个解决方案
解决方案1
0 已采纳 2012-07-14 09:05:16
You could store all the letters that the user has already entered into some data structure like hash table(faster) / array(have to iterate through whole array). 您可以将用户已经输入的所有字母存储到某种数据结构中，例如哈希表（更快）/数组（必须遍历整个数组）。 Then when the user enters the next letter in the letterbox , just check against the previously entered characters stored to find if it has been entered before or not. 然后，当用户在信箱中输入下一个字母时，只需对照先前输入的字符进行检查，以查找是否之前输入过。
解决方案2
0 2012-07-14 09:09:02
You could in theory use any collection type, but it would be better to use one that has a built in key eg sortedlist or dictionary which would stop any duplicate letter being added. 从理论上讲，您可以使用任何集合类型，但是最好使用具有内置键的类型，例如sortedlist或Dictionary，这样可以阻止添加任何重复的字母。 Obviously you'd need to handle (or ignore) the exception which is thrown if the same letter was used again. 显然，您需要处理（或忽略）如果再次使用相同的字母会引发的异常。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.