1987考试评级，无题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main ()

{

int t;

 while(scanf("%d", &t) != EOF)

switch(t/10)

{

case 1:

case 2:

case 3:printf("D\n");break;

case 4:

case 5:printf("C\n");break;

case 6:

case 7:printf("B\n");break;

case 8:

case 9:

case 10:printf("A\n");break;

default:printf("Score is error!\n");break;

}

return 0;

}