#include <stdio.h>
int main(int argc, char const *argv[])
{
    int socer;
    printf("请输入你的成绩  ");
    scanf("%d", &socer);
    if (socer > 100 || socer < 0)
    {
        printf("请输入0-100的数值");
    }
    else
    {
        switch (socer / 10) //这里用到了int型非整数向下取整
        {
        case 9:
            printf("A/n");
            break;
        case 8:
            printf("B/n");
            break;
        case 6 || 7:
            printf("C/n");
        default:
            printf("补考/n");
            break;
        }
    }
 
    return 0;
}
 

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