成绩划分

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int score;
    scanf("%d",&score);
    if(score<0||score>100)
    {
        printf("输入数据错误\n");
        exit(0);
    }
    switch(score/10) 
    {
        case 10:
        case 9:printf("优秀\n");break;
        case 8:printf("良好\n");break;
        case 7:printf("中等\n");break;
        case 6:printf("及格\n");break;
        defult:printf("不及格\n");break;
    }
    return 0;
}