题解 | #小乐乐转换成绩#

#include <stdio.h>

int main() {
    int n = 0;
    scanf("%d",&n);
    int i = 0;
    int j = n;
    j/=10;
    if(n>=0)
    {
        switch(j)
    {
        case 0:
        case 1:
        case 2:
        case 3:
        case 4:
        case 5:
        printf("E");
        break;
        case 6:
        printf("D");
        break;
        case 7:
        printf("C");
        break;
        case 8:
        printf("B");
        break;
        case 9:
        case 10:
        printf("A");
        break;
        default:
        printf("F");
    }
    }
    else {
    printf("F");
    }
    return 0;
}