输入若干个百分制成绩，输出对应的五分制成绩，输入结束后再分别输出这五个分段的人数。五分制成绩用字母A、B、C、D和E分别表示百分制成绩的100~90、89~80、79~70、69~60、59~0-Input several centesimal system performance, the output of the five grade marking system corresponding to the input end result, after the five output re