Introduction - If you have any usage issues, please Google them yourself
Enter a number from the keyboard student achievement, student achievement for each separated by a comma, for example, 56,89,99,90 finished entering grades by the end of the Enter key, and then less than 60 points, respectively, the number of statistics, 60 assigned to 80, 80 assigned to the number 100, and output the result, require a subroutine to complete this study.