1060 成绩评级

#include<iostream>using namespace std;int main(){int n;cin>>n;n=n/10;switch(n){case 10:case 9:cout<<"A"<<endl;break;case 8:cout<<"B"<<endl;break;case 7:cout<<"C"<<endl;break;case 6:cout<<"D"<<endl;break;default:    cout<<"E"<<endl;break;}return 0;}