编辑代码

#include <stdio.h>
int main ()
{
    int x;
    char ch;
    printf("请输入考试成绩\n");
    scanf("%d",&x);
    switch((int)(x/10))
    {
        case 10:
        case 9:ch='A';break;
        case 8:ch='B';break;
        case 7:ch='C';break;
        case 6:ch='D';break;
        default:ch='E';break;
    }
    printf("%d分的成绩等级是%c\n",x,ch);
}