#include<iostream>
using namespace std;
int main()
{
int i,score;
cout<<“你考试考了多少分？(0~100):”;
cin>>score;
if (score>100||score<0)
cout<<“分数必须在0到100之间！”;
else
{
i=score/10;
switch(i)
{
case 10:
case 9:
cout<<“你的成绩为优！”;
break;
case 8:
cout<<“你的成绩为良！”;
break;
default:
cout<<“你的成绩为差！”;
}
}
return 0;
}