这是我自己的代码，从我对如何从字符数组中查找单词的答案中提取出来的？：
public class Trie{ public struct Letter { public const string Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; public static implicit operator Letter(char c) { return new Letter() { Index = Chars.IndexOf(c) }; } public int Index; public char ToChar() { return Chars[Index]; } public override string ToString() { return Chars[Index].ToString(); } } public class Node { public string Word; public bool IsTerminal { get { return Word != null; } } public Dictionary<Letter, Node> Edges = new Dictionary<Letter, Node>(); } public Node Root = new Node(); public Trie(string[] words) { for (int w = 0; w < words.Length; w++) { var word = words[w]; var node = Root; for (int len = 1; len <= word.Length; len++) { var letter = word[len - 1]; Node next; if (!node.Edges.TryGetValue(letter, out next)) { next = new Node(); if (len == word.Length) { next.Word = word; } node.Edges.Add(letter, next); } node = next; } } }
