1849: 成绩等级转换

解题思路:

注意事项:

参考代码:

#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    while(cin>>n){
        if(n>=90&&n<=100){
            cout<<"A"<<endl;
        }else if(n>=80&&n<=89){
            cout<<"B"<<endl;
        }else if(n>=70&&n<=79){
            cout<<"C"<<endl;
        }else if(n>=60&&n<=69){
            cout<<"D"<<endl;
        }else if(n>=0&&n<=59){
            cout<<"E"<<endl;
        }else{
            cout<<"Score is error!"<<endl;
        }
    }
    return 0;
}