Introduction - If you have any usage issues, please Google them yourself
Preparation of an achievement record book, each student information includes: Student ID, name, C language achievement. Specific functions: (1) to create a linked list of information and save to disk file (2) to read the disk file and output all students (3) the query results by student number or name (4) Add a track record (5 results) modified specify the name or school students can save (6) show output below 60 points, 60 to 79, 80 89, 90 points above scores of students (optional).