二叉树、多叉树子路径遍历

  1 /// <summary>
  2     /// 二叉树
  3     /// </summary>
  4     /// <typeparam name="T"></typeparam>
  5     class Road<T>
  6     {
  7         T data;
  8         Road<T> Lnode, rnode, pnode;
  9         public T Data
 10         {
 11             get { return data; }
 12             set { data = value; }
 13         }
 14         public Road<T> LNode
 15         {
 16             get { return Lnode; }
 17             set { Lnode = value; }
 18         }
 19         public Road<T> RNode
 20         {
 21             get { return rnode; }
 22             set { rnode = value; }
 23         }
 24         public Road<T> PNode
 25         {
 26             get { return pnode; }
 27             set { pnode = value; }
 28         }
 29         public Road() { }
 30         public Road(T data)
 31         {
 32             this.data = data;
 33         }
 34     }
 35 
 36     class 叉树测试
 37     {
 38         //测试的主方法   
 39         static void Main(string[] args)
 40         {
 41             Road<string> rootNode = BinTree();
 42             Stack<string> stack = new Stack<string>();
 43             findPathNode<string>(rootNode, stack);
 44             Console.WriteLine("");
 45 
 46             RoadLink<string> roadNode = BinRoad();
 47             Stack<string> roadStack = new Stack<string>();
 48             findPath<string>(roadNode, roadStack);
 49             Console.WriteLine("over");
 50             Console.Read();
 51         }
 52        
 53         static Road<string> BinTree()
 54         {
 55             Road<string>[] binTree = new Road<string>[8];
 56 
 57             //创建节点  
 58             binTree[0] = new Road<string>("A");
 59             binTree[1] = new Road<string>("B");
 60             binTree[2] = new Road<string>("C");
 61             binTree[3] = new Road<string>("D");
 62             binTree[4] = new Road<string>("E");
 63             binTree[5] = new Road<string>("F");
 64             binTree[6] = new Road<string>("G");
 65             binTree[7] = new Road<string>("H");
 66 
 67             //使用层次遍历二叉树的思想，构造一个已知的二叉树  
 68             binTree[0].LNode = binTree[1];
 69             binTree[0].RNode = binTree[2];
 70             binTree[1].RNode = binTree[3];
 71             binTree[2].LNode = binTree[4];
 72             binTree[2].RNode = binTree[5];
 73             binTree[3].LNode = binTree[6];
 74             binTree[3].RNode = binTree[7];
 75 
 76             //返回二叉树根节点  
 77             return binTree[0];
 78         }
 79               
 80         static void findPathNode<T>(Road<T> root, Stack<T> stack)
 81         {
 82             if (root == null)
 83             {
 84                 return;
 85             }
 86             // 把当前结点进栈  
 87             stack.Push(root.Data);
 88             // 如果是叶子结点，而且和为给定的值，则打印路径  
 89             bool isLeaf = root.LNode == null && root.RNode == null;
 90             if (isLeaf)
 91             {
 92                 List<object> tmpDatas = new List<object>();
 93                 foreach (var item in stack)
 94                 {
 95                     tmpDatas.Add(item);
 96                 }
 97                 tmpDatas.Reverse();
 98 
 99                 foreach (var item in tmpDatas)
100                 {
101                     Console.Write(item + "-");
102                 }
103                 Console.WriteLine("");
104                 
105             }
106 
107             // 如果不是叶子结点，则遍历它的子结点  
108             if (root.LNode != null)
109             {
110                 findPathNode(root.LNode, stack);
111             }
112             if (root.RNode != null)
113             {
114                 findPathNode(root.RNode, stack);
115             }
116             // 在返回到父结点之前，在路径上删除当前结点  
117             stack.Pop();
118         }
119 
120         static RoadLink<string> BinRoad()
121         {
122             RoadLink<string>[] binTree = new RoadLink<string>[10];
123 
124             //创建节点  
125             binTree[0] = new RoadLink<string>("A");
126             binTree[1] = new RoadLink<string>("B");
127             binTree[2] = new RoadLink<string>("C");
128             binTree[3] = new RoadLink<string>("D");
129             binTree[4] = new RoadLink<string>("E");
130             binTree[5] = new RoadLink<string>("F");
131             binTree[6] = new RoadLink<string>("G");
132             binTree[7] = new RoadLink<string>("H");
133             binTree[8] = new RoadLink<string>("I");
134             binTree[9] = new RoadLink<string>("J");
135 
136             //使用层次遍历二叉树的思想，构造一个已知的二叉树  
137             binTree[0].SubRoads = new List<object>();
138             binTree[0].SubRoads.Add(binTree[1]);
139             binTree[0].SubRoads.Add(binTree[2]);
140 
141             binTree[1].SubRoads = new List<object>();
142             binTree[1].SubRoads.Add(binTree[3]);
143 
144             binTree[2].SubRoads = new List<object>();
145             binTree[2].SubRoads.Add(binTree[3]);
146 
147             binTree[3].SubRoads = new List<object>();
148             binTree[3].SubRoads.Add(binTree[4]);
149             binTree[3].SubRoads.Add(binTree[5]);
150             binTree[3].SubRoads.Add(binTree[7]);
151 
152             binTree[4].SubRoads = new List<object>();
153             binTree[4].SubRoads.Add(binTree[6]);
154 
155             binTree[5].SubRoads = new List<object>();
156             binTree[5].SubRoads.Add(binTree[6]);
157 
158             binTree[7].SubRoads = new List<object>();
159             binTree[7].SubRoads.Add(binTree[8]);
160             binTree[7].SubRoads.Add(binTree[9]);
161 
162             binTree[8].SubRoads = new List<object>();
163             binTree[8].SubRoads.Add(binTree[6]);
164 
165             binTree[9].SubRoads = new List<object>();
166             binTree[9].SubRoads.Add(binTree[6]);
167 
168             //返回二叉树根节点  
169             return binTree[0];
170         }
171 
172         static void findPath<T>(RoadLink<T> root, Stack<T> stack)
173         {
174             if (root == null)
175             {
176                 return;
177             }
178             // 把当前结点进栈  
179             stack.Push(root.Data);
180             // 如果是叶子结点，而且和为给定的值，则打印路径  
181             bool isLeaf = root.SubRoads == null;
182             //bool isLeaf = root.Data.Equals("E");//寻找的点
183             if (isLeaf)
184             {
185                 List<object> tmpDatas = new List<object>();
186                 foreach (var item in stack)
187                 {
188                     tmpDatas.Add(item);
189                 }
190                 tmpDatas.Reverse();
191 
192                 foreach (var item in tmpDatas)
193                 {
194                     Console.Write(item + "-");
195                 }
196                 Console.WriteLine("");
197 
198             }
199             // 如果不是叶子结点，则遍历它的子结点  
200             if (root.SubRoads != null)
201             {
202                 foreach (var item in root.SubRoads)
203                 {
204                     var obj = item as RoadLink<T>;
205                     findPath(obj, stack);
206                 }
207 
208             }
209             // 在返回到父结点之前，在路径上删除当前结点  
210             stack.Pop();
211         }
212     }
213 
214     /// <summary>
215     /// 多叉树
216     /// </summary>
217     /// <typeparam name="T"></typeparam>
218     class RoadLink<T>
219     {
220         T data;
221         /// <summary>
222         /// 子节点
223         /// </summary>
224         List<object> subRoads = null;
225         public T Data
226         {
227             get { return data; }
228             set { data = value; }
229         }
230         /// <summary>
231         /// 子节点
232         /// </summary>
233         public List<object> SubRoads
234         {
235             get { return subRoads; }
236             set { subRoads = value; }
237         }
238         public RoadLink() { }
239         public RoadLink(T data)
240         {
241             this.data = data;
242         }
243 
244         public void AddSubRoad(object subRoad)
245         {
246             if (subRoads == null) subRoads = new List<object>();
247             if (subRoads.Contains(subRoad)) subRoads.Add(subRoad);
248         }
249     }