HDU 2140 Michael Scofield's letter

#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e5 + 10;
char s[maxn];
char a[11]={‘b‘, ‘q‘, ‘t‘, ‘m‘, ‘i‘, ‘c‘, ‘a‘, ‘e‘, ‘l‘};
char b[11]={‘ ‘,  ‘,‘, ‘!‘, ‘l‘, ‘e‘, ‘a‘, ‘c‘, ‘i‘, ‘m‘};


int main() {
    while(~scanf("%s", s)) {
        int len = strlen(s);
        for(int i = 0; i < len; i ++) {
            if(s[i] == ‘b‘)
                s[i] = ‘ ‘;
            else if(s[i] == ‘t‘)
                s[i] = ‘!‘;
            else if(s[i] == ‘m‘)
                s[i] = ‘l‘;
            else if(s[i] == ‘i‘)
                s[i] = ‘e‘;
            else if(s[i] == ‘c‘)
                s[i] = ‘a‘;
            else if(s[i] == ‘a‘)
                s[i] = ‘c‘;
            else if(s[i] == ‘e‘)
                s[i] = ‘i‘;
            else if(s[i] == ‘l‘)
                s[i] = ‘m‘;
            else if(s[i] == ‘q‘)
                s[i] = ‘,‘;
        }

        printf("%s\n", s);
    }
    return 0;
}