能够实现数据的输入，删除等操作。 请一定要在自己本机上能实验通过的，例如输入6个数，然后删除第3个，插入一个数等-Able to achieve data input, delete, etc. operations. Requests must be in their own experiments on this machine can be adopted, for example, the number of type 6, and then delete clause 3, ins