1, the core function of the input function is scanf and then match the loop.
2. Adding this is similar to input, except that it is added at the end.
3. Delete You can overwrite the information to be deleted with a piece of other information.
5. Modify: first find the information to be modified in sequence, and then enter some data to be modified.
6. Browse and output all information in turn.
7. Number query Enter the number and then search for the output in sequence.
8, bubble separation.