二叉树示例:
二叉树结构,其中parent为父节点,child1为左孩子,child2为右孩子,data为该节点存放的数据。
1 class TreeNode
2 {
3 public TreeNode parent = null;
4 public TreeNode child1 = null;
5 public TreeNode child2 = null;
6
7 public object data = null;
8 }
2 {
3 public TreeNode parent = null;
4 public TreeNode child1 = null;
5 public TreeNode child2 = null;
6
7 public object data = null;
8 }
创建二叉树
1static TreeNode CreateBinaryTree()
2{
3 TreeNode[] node = new TreeNode[6];
4
5 for (int i = 0; i < 6; i++)
6 {
7 node[i] = new TreeNode();
8 node[i].data = i;
9 }
10
11 node[0].child1 = node[1];
12 node[0].child2 = node[2];
13 node[1].parent = node[2].parent = node[0];
14
15 node[1].child1 = node[3];
16 node[1].child2 = node[4];
17 node[3].parent = node[4].parent = node[1];
18
19 return node[0];
20}
2{
3 TreeNode[] node = new TreeNode[6];
4
5 for (int i = 0; i < 6; i++)
6 {
7 node[i] = new TreeNode();
8 node[i].data = i;
9 }
10
11 node[0].child1 = node[1];
12 node[0].child2 = node[2];
13 node[1].parent = node[2].parent = node[0];
14
15 node[1].child1 = node[3];
16 node[1].child2 = node[4];
17 node[3].parent = node[4].parent = node[1];
18
19 return node[0];
20}
显示二叉树(后序遍历,即先访问左孩子,再访问右孩子,最后访问根)
1static void DispalyBinaryTree(TreeNode root)
2{
3
4 if (root.child1 == null && root.child2 == null)
5 {
6 Console.WriteLine(root.data);
7 }
8 else
9 {
10 DispalyBinaryTree(root.child1);
11 DispalyBinaryTree(root.child2);
12 Console.WriteLine(root.data);
13 }
14}
2{
3
4 if (root.child1 == null && root.child2 == null)
5 {
6 Console.WriteLine(root.data);
7 }
8 else
9 {
10 DispalyBinaryTree(root.child1);
11 DispalyBinaryTree(root.child2);
12 Console.WriteLine(root.data);
13 }
14}
使用
1 TreeNode n = CreateBinaryTree();
2 DispalyBinaryTree(n);
2 DispalyBinaryTree(n);