18b 20程序ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssb-procedures sssssssssssssssssssssssssssss sss sssss ssssssssssssssssssssssssssssssssssssssss sssssssssssssssb

学生成绩管理，从键盘接受80个学生成绩，并统计各个分数段的人数(Student achievement management, from the keyboard to accept 80 student achievement, and statistics of the scores of the number of segments)