题解 | #判断成绩等级#

#include <iostream>
#include <unordered_map>
using namespace std;

int main() {
    int score;
    cin >> score;
    unordered_map<int,string>grademap{
        {10,"成绩不合法"},
        {9,"优秀"},
        {8,"良"},
        {7,"中"},
        {6,"及格"},
    };
    if(score>100 || score<0)
        printf("成绩不合法");
    if(score<60 and score>0)
        printf("差");
    else{
        int key = score/10;
        cout<<grademap[key]<<endl;
    }


    
    return 0;
}