这样会不会好点
#include<stdio.h>
int main()
{
int score;
L1:printf("请输入你的成绩为：");
scanf("%d",&score);
if(score>=0&&score<=100)
switch( score/10)
{
case 10:
case 9:
printf("等级A\n");break;
case 8:
printf("等级B\n");break;
case 7:
case 6:
printf("等级C\n");break;
default:
printf("等级D\n");break;
}
else
printf("您输入的数有误！请重新输入！\n");
goto L1;
return 0;
}
