c语言-switch成绩分类

#include<stdio.h>
int main()
{
int score;
printf("请输入一个分数\n");
scanf("%d",&score);


/*if(score>80){

printf("学生的等级为A\n",score);

}else if(score>70&&score<=80){
printf("学生的等级为B\n",score);
}
else if(score>60&&score<70){
printf("学生的等级为C\n",score);

}
else printf("学生的等级为D\n",score);
*/

switch(score/10){

case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
printf("混日子\n");
break;

case 6:
printf("加油吧骚年");
break;

case 7:
printf("还可以吧\n");
break;

case 8:
case 9:
case 10:
printf("优秀\n");
break;

deflaut:
printf("请重新输入正确成绩\n);

}

printf("done!");
return 0;
}