编辑代码

void  main()
{
    int n;
    printf("请输入学生成绩");
    scanf("%d",&n);
    swutch(n/10)
    {
        case 10:
        case 9:
           printf("A\n");
           break;
        case 8:
           printf("B\n");
           break;
        case 7:
        case 6:
          printf("C\n");
          break;
        case 5:
        case 4:
        case 3:
        case 2:
        case 1:
           printf("D\n");
           break;
        default:
            printf("输入错误");    
    }
}