题解 | #判断成绩等级#

#include <iostream>
using namespace std;
int main() {
     int score;
    cin >> score;
    score>100?cout << "成绩不合法":
     score>=90?cout << "优秀":
      score>=80?cout << "良":
       score>=70?cout << "中":
        score>=60?cout << "及格":
         score>=0?cout << "差 ":
    cout << "成绩不合法";
    return 0;
}

套三元套的