从键盘输入数据并存到文件中，创建链表节点数据从文件读取，插入删除节点，将最后的数据存回到文件中 并释放节点链表-Both from the keyboard input data to a file, create a node list data read from the file, insert the deleted node, the data will be kept back to the final document and the release of the node list