分数换字母

#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {

    int n;
    char score;
    cin>>n;
    switch(n/10){
        case 10:
        case 9:score='A';break;
        case 8:
        case 7:score='B';break;
        case 6:score='C';break;
        case 5:
        case 4:
        case 3:
        case 2:
        case 1:
        case 0:score='D';break;
        default: score=32;break;
        
}
    cout<<score<<endl;
    system("pause");
    return 0;
}