请问一下，哪里出了错

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    char a;
    cin >> n;
    for (int i = 1;i <= n;i ++) {
        int x;
        cin >> x;
        switch(x/10){
            case 10:
                    a = 'A';
                continue;
            case 9:
                    a = 'A';
                    continue;
            case 8:
                    a = 'B';
                    continue;
            case 7:
                    a = 'C';
                    continue;
            case 6:
                    a = 'D';
                    continue;
            case 5:
                    a = 'E';
                    continue;
            case 4:
                    a = 'E';
                    continue;
            case 3:
                    a = 'E';
                    continue;
            case 2:
                    a = 'E';
                    continue;
            case 1:
                    a = 'E';
                    continue;
        }
    }
    cout << a;
    return 0; 
}

代码都不全……

输入学生成绩那里你好像用了中文的分号

1. 第五行使用了中文输入法（分号）
2. case语句未写完