Introduction - If you have any usage issues, please Google them yourself
1) can be read from the screen of a student' s information and information into the data file. 2) to the specified information is deleted from the file. 3) by number, name of student information retrieval and search results displayed on the screen. 4) statistics the total score of all students in the class rankings. 5) to the average results of the statistical subjects and passing rate. 6) requires the error function, such as gender can only enter the men and women, the input error to re-enter. 7) If you can not retrieve the appropriate information should prompt the user.