(2) the student information query function (, all can query the achievements and information of students, such as pass or fail, a screen display 10 lines, more than 10 lines of press the space key selling display)
(3) student information save
Can just input the information to save,
(4) student information changes
Enter the student id, query and show the student id information, based on the modified
(5) student information delete
Enter the student id, delete the student number corresponding performance information
(6) statistical information
All students can statistics of the current system
