2004 成绩转换

#include<iostream>using namespace std;int main(void){    int n;    while(cin>>n)    {        if(n>100||n<0)        {            cout<<"Score is error!"<<endl;            continue;        }        switch(n/10)        {            case 9:            case 10:            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;}