Introduction - If you have any usage issues, please Google them yourself
Enter the 10 student information, including student number, name and achievements, the output level of student achievement and the number of students failed.
Each student s record contains the name, student number, grades and grade requirements definition and call the function set_grade (),
According to determine the level of student achievement, and the number of unqualified statistics, grade setting: 0 to 59 D, 60 ~ 69 for C,
70 to 84 B, 85 ~ 100 for A