#include<stdio.h>
void main()
{

    int fs;
    scanf("%d",&fs);
    fs=fs/10;
    fs=fs;
    switch(fs)
    {
   
    case 0:printf("e");break;
    case 1:printf("e");break;
        case 2:printf("e");break;
            case 3:printf("d");break;
                case 4:printf("d");break;
                    case 5:printf("c");break;
                        case 6:printf("c");break;
                            case 7:printf("b");break;
                                case 8:printf("b");break;
                                    case 9:printf("a");break;
                                     case 10:printf("a");break;
                                    default:printf("未知错误");

    }

}
————————————————————————
如上题目，但输入101~109之间的分数，还是a等级！
众所周知分数是没有101分的（满分100分）！
这个问题怎么解决啊~~