学生成绩等级

#include 
#include 

int main()
{

    int i;
	while(1)
	{
    printf("请输入学生成绩：");
	scanf("%d",&i);
    switch(i/10)
    {
	case 10:
	case 9:
            printf("A\n");
            break;
	case 8:
            printf("B\n");
            break;
	case 7:
            printf("C\n");
            break;
	case 6:
            printf("D\n");
            break;
       default:
            printf("E\n");
            break;
    }
	}

}