Introduction - If you have any usage issues, please Google them yourself
Reading from the keyboard into a class of students (number 15) test scores, separated by commas or spaces each student achievement, then the results of the classes conducted in descending order, requiring the display sort results, and statistics class achievement, given less than 60 points, 60 segments, 70 segments, 80 segments and 90 sub-segments and the number of each class s average score.