说明：  no intro
(Data Processing System test scores Advantages and disadvantages of the program design: use an array to achieve various functions and easy to read, easy to operate. Features include: 1. Create the file: Save the file to create multiple different data load: any file can be loaded from existing data Save: input data can be saved to an existing file, the proposed new document, otherwise it will overwrite the original file data. 2. Add or delete student data, student number search by name of student, grades (including grade point average), find the average scores and average grade subjects. 3. A variety of sorting: sort by student number, the average score ranking, sorting results of a course. 4. Failed class statistics: statistical tests are failing students, designated students who failed courses, three, or three or more courses failing students and failing students in each course and the ratio of the total number. 5. Score segment query:. A total score of sub-queries (such as the tot)