对学员的结业考试成绩评测，学习成绩大于等于90；显示为优秀，成绩大于等于80，显示良好

Scanner input = new Scanner(System.in);
  System.out.println(“对学员的结业考试成绩评测”);
  double  achievement= input.nextDouble();
  if(achievement>=90){
   System.out.println(“优秀”);}
  else if (achievement>=80){
   System.out.println(“良好”);}
  else if (achievement>=60){
   System.out.println(“中等”);}
  else if(achievement<60){
   System.out.println(“不合格”);} 
  }
 }