拼多多笔试编程

	private static void print(Node root, String string) {
		if(orignalRoot==root){
			System.out.println(string+root.name);
		}else {
			System.out.println(string+"-- "+root.name);
		}
		string=string.replace('`', ' ');
		
		PriorityQueue<Node> children=root.children;
		while (!children.isEmpty()) {
			Node child=children.poll();
			String string2;
			if(children.isEmpty()){//可以不加上|
				string2=root==orignalRoot?string+"`":string+"   `";
				print(child, string2);
			}else {
				string2=root==orignalRoot?string+"|":string+"   |";
				print(child, string2);
			}
		}
	}