从键盘上输入某班学生的某科目成绩.输入按学生的学号由小到大的顺序输入,统计检查每个学生的名次.将统计结果在屏幕上显示. -Input from the keyboard of a class of students in a subject results. Input by students from small to large order of its input, statistical examination of the ranking of each student. The