双向连表的演示程序 1、创建连表 2、在头部增加节点 3、在尾部增加节点 4、插入节点 5、删除节点 6、遍历连表-Even two-way table 1 demo program to create even the Table 2, the increase in the head node 3, an increase in the tail of the node 4, insert the node