C++判断是回文串还是镜像串

#include <iostream>
#include <string>
#include <cstdio>
#include <cctype>
#pragma warning(disable:4996)
using namespace std;
string str = "A   3  HIL JM O   2TUVWXY51SE Z  8 ";//镜像串的特征，只有部分字母和数字有镜像
string out[] = { "啥都不是","是个回文串","是个镜像串","即是回文串，又是镜像串" };
char r(char s)
{
    if (isalpha(s)) return str[s - 'A'];
    return str[s - '' + ];
}
int main() {
    char a[];
    while (scanf("%s", a) == )
    {
        int len = strlen(a);
        int hui = , mirror = ;
        for (int i = ;i < (len+) / ;++i)
        {
            if (a[i] != a[len - i - ])  hui = ;//不是回文串
            if (r(a[i]) != a[len - i - ]) mirror = ;//不是镜像串
        }
        cout << out[mirror *  + hui];
    }
    return ;
}