Java--成绩分类

import java.util.Scanner; 
public class grade1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int score;
        int m;
        System.out.println("请输入分数:");
        Scanner scanner  = new Scanner(System.in);
         score = scanner.nextInt();
         m=score/10;
        switch(m){
           case 10 :
           case 9 :
               System.out.println("A");
               break;
           case 8 :
               System.out.println("B");
           case 7 :
               System.out.println("C");
               break;
           case 6 :
               System.out.println("D");
               break;
           case 5 :
           case 4 :
           case 3 :
           case 2 :
           case 1 :
           case 0 :
               System.out.println("E");
               break;
               default:
                   System.out.println("输入的分数不符合规则!");
        }

    }

}