题解 | #判断成绩等级#

#include <iostream>
using namespace std;

int main() {
    
    int score;
    cin >> score;
    if(score < 0||score >100) cout << "成绩不合法";
    else {
        switch(score/10){
            case 10:
            case 9 :cout << "优秀";break;
            case 8 :cout << "良";break;
            case 7 :cout << "中";break;
            case 6 :cout << "及格";break;
            case 5 :
            case 4 :
            case 3 :
            case 2 :
            case 1 :
            case 0 :cout << "差";
        }
    }
    return 0;
}