出错了

#include"stdio.h"
void main()
{
    float score;
    char grade;
    printf("请输入学生成绩:");
    scanf("%f",&score);
    while(score>100||score<0)
    {printf("\n输入有误，请重新输入");
    scanf("%f",&score);
    }
        switch((int)(score/10))
        {
                  case 10:
        case 9:grade='A';break;
            case 8:grade='B';break;
                case 7:grade='C';break;
                    case 6:grade='D';break;
                        case 5:
                            case 4:
                                case 3:
                                    case 2:
                                        case 1:
                                            case 0:grade='E';
    }
    printf("成绩是 %5.lf,相应的等级是%c。\n",score,grade);
}









--------------------Configuration: 1 - Win32 Debug--------------------
Compiling...
1.cpp
E:\程序\1.cpp(15) : error C2046: illegal case
E:\程序\1.cpp(16) : error C2046: illegal case
E:\程序\1.cpp(17) : error C2046: illegal case
E:\程序\1.cpp(18) : error C2046: illegal case
E:\程序\1.cpp(19) : error C2046: illegal case
E:\程序\1.cpp(20) : error C2046: illegal case
E:\程序\1.cpp(21) : error C2046: illegal case
E:\程序\1.cpp(22) : error C2046: illegal case
E:\程序\1.cpp(23) : error C2046: illegal case
E:\程序\1.cpp(28) : fatal error C1004: unexpected end of file found
执行 cl.exe 时出错.

1.exe - 1 error(s), 0 warning(s)



咋回事啊，书上是这么个答案！！！

[ 本帖最后由 小小熊宝宝 于 2008-8-16 22:47 编辑 ]

没错啊，运行得挺正常的。

应该是编译器的原因，我的WIN-TC正常。