Plz help.. SIGSEGV error.. getting no idea...

#include
using namespace std;
#include
#include
#include
#include

#define TLEN 150000

int countArr[128];

int compare(const void a, const void b){
int tmp = countArr[(int)(
(char
)a)] - countArr[(int)((char)b)];
if(tmp == 0){
return ((char)a) - ((char)b);
}
else
return tmp;
}

int main(){
int T;
cin >> T;
char *cipher = new char[TLEN];
while(T > 0){
char fseq[27], waste[50]={’\0’};
cin >> fseq;
gets(waste);
gets(cipher);
int len = strlen(cipher);

    for(int i=0; i<128; i++)
        countArr[i] = 0;
    
    char cipherNew[len+1];
    
    int k = 0;
    
    for(int i=0; i<len; i++) {
        if(isalpha(cipher[i]))
            cipherNew[k++] = tolower(cipher[i]);
    }
    
    cipherNew[k] = '\0';
    
    for(int i=0; i<len; i++){
            countArr[(int)cipherNew[i]]++;
    }
    
    qsort(cipherNew,k,sizeof(char),compare);
    
    char map[128] = {'\0'};
    int j = 25;
    for(int i=k-1; i>=0; i--){
        if(map[(int)cipherNew[i]] == '\0'){
            map[(int)cipherNew[i]] = fseq[j];
            --j;
        }
    }
    
    char res[len+1];
    
    for(int i=0; i<len; i++){
        if(isalpha(cipher[i])) {
            if(isupper(cipher[i])) {
                res[i] = toupper(map[(int)tolower(cipher[i])]);
            }
            else
                res[i] = map[(int)cipher[i]];
        }
        else{
            res[i] = cipher[i];
        }
    }
    res[len] = '\0';
    
    cout << res << "\n"; 
    --T;
}

}

//