求思路
可以用if语句的嵌套或者switch语句
#include <stdio.h>
#include <stdlib.h>
int main()
{
int score;
scanf("%d",&score);
switch (score/10)
{
case 10: printf("A");break;
case 9: printf("A");break;
case 8: printf("B");break;
case 7: printf("C");break;
case 6: printf("D");break;
default:printf("E");break;
}
return 0;
}