通过指定考试成绩，判断学生等级
90-100 优秀80-89 好70-79 良60-69 及格60以下 不及格public class Test09 { public static void main(String[] args) { int score =75; if(score<0 || score>100){ System.out.println(“输入成绩有误”); }else if(score >=90 && score <=100){ System.out.println(“优秀”); }else if(score >=80 && score <=89){ System.out.println(“好”); }else if(score >=70 && score <=79){ System.out.println(“良”); }else if(score >=60 && score <=69){ System.out.println(“及格”); }else { System.out.println(“不及格”); } } }
