题解 | 判断成绩等级

#include <iostream>
using namespace std;
#define PRINT_GRADE(score)                   \                                 
        if(score>100)\
        {\
            cout<<"成绩不合法"<<endl;\
        }\
        else if (score >= 90) {  \
            cout << "优秀" << endl;          \
        } else if (score >= 80) {            \
            cout << "良" << endl;            \
        } else if (score >= 70) {            \
            cout << "中" << endl;             \
        } else if (score >= 60) {            \
            cout << "及格" << endl;          \
        } else if (score >= 0 && score < 60) {\
            cout << "差" << endl;            \
        } else {                              \
            cout << "成绩不合法" << endl;   \
        }                                           
   
                 
int main() {
    
    int score;
    cin >> score;

    // write your code here......
   
     PRINT_GRADE(score);

    return 0;
}