class BinaryTree {
static class Node {char data;Node left;Node right;int i;}
public static char[] dataArray = new char[] { ‘a’, ‘b’, ‘ ‘, ‘d’ };
public static Node creatRoot(Node node) {if (node.i < dataArray.length) {if (node.data == ‘ ‘)node = null;if (node != null)node.data = dataArray[node.i];node.left = creatLeft(node);node.right = creatRight(node);
}return node;}
public static Node creatLeft(Node node) {if (node != null) {node.left = new Node();node.left.i = 2 * node.i + 1;creatRoot(node.left);}return node.left;
}
public static Node creatRight(Node node) {if (node != null) {node.right = new Node();node.right.i = 2 * node.i + 2;creatRoot(node.right);}return node.right;}
public static void main(String args[]) {Node node = new Node();
node = creatRoot(node);
System.out.print(node.data + " " + node.left.data + " "+ node.right.data + " " + node.left.left.data);
}
}
走过一个又一个陌生的城市，去感受旖旎的自然风光，
