范例：成绩排队 丛健盘读取学生成绩（整数） 取得最好成绩 然后根据下表沤成绩进行等级划分 Grade is A if score is >best-10; Grade is B if score is >best-20; Grade is c if score is >=best-30; Grade is D if score is >best-40; Grade is F otherwise. 源码 ©2006计算机系杨厚群 All rights lefts reserved ©2006 计算机系 杨厚群 All rights & lefts reserved. 范例：成绩排队 从键盘读取学生成绩（整数），取得最好成绩 ，然后根据下表将成绩进行等级划分 − Grade is A if score is >= best–10; − Grade is B if score is >= best–20; − Grade is C if score is >= best–30; − Grade is D if score is >= best–40; − Grade is F otherwise. 源码