yutree := tyutree.create;
node := yutree.add(nil);//nil,表示增加根结点
node.data := pointer(0);
node := yutree.addchild(node);node指向结点0
node.data := pointer(1);
yutree := tyutree.create;
node := yutree.add(nil);//nil,表示增加根结点
node.data := pointer(0);
node := yutree.addchild(node);node指向结点0
node.data := pointer(1);