soft code not working

#include <iostream>

using namespace std;

void mostMet(char* sub, char* stringMnoj, int* counters, int sizeOfSub, int sizeOfString)
{
    int poz = 0;
    int tempBiggest = 0;


    for (int j = 0; j < sizeOfString; j++) {
        for (int i = 0; i < sizeOfSub; i++) {

            if (sub[i] == stringMnoj[j])
            {
                counters[i] = counters[i] + 1;
            }
        }
    }


    for (int i = 0; i < sizeOfSub; i++)
    {
        if (counters[i] > tempBiggest)
        {
            tempBiggest = counters[i];
            poz = i;
        }
    }

    cout << "Nai sreshtanata bukva ot vuvedenoto mnojestvo e " << sub[poz] << " i tq se sreshta: " << counters[poz] << " puti." << endl;

}



int main()
{
        //zadacha stringove
        // v sluchiq proverka na nai chesto sreshtan indeks ot mnojestvoto
    int sizeOfSub, sizeOfString;
    cout << "Vuvedete razmer na mnojestvoto. " << endl <<  endl;
    cin >> sizeOfSub;
    cout << "Vuvedete razmer na stringa" << endl << "*raztoqniqta mejdu dumite se broqt!*" << endl;
    cin >> sizeOfString;

    char* subMnoj = new char[sizeOfSub + 1];
    char* stringMnoj = new char[sizeOfString + 1];

    cout << "Vuvedete bukvite za mnojestvoto" << endl << "*Ne izpolzvaite raztoqniq!*" << endl;
    cin >> subMnoj;
    cout << "Vuvedete izrechenieto" << endl;
    cin >> stringMnoj;

    int* countersForMnoj = new int[sizeOfSub];  //Razmera na cauntarite = na razmera na mnojestvoto
    for (int i = 0; i < sizeOfSub; i++){
        countersForMnoj[i] = 0;
    }

    mostMet(subMnoj, stringMnoj, countersForMnoj, sizeOfSub, sizeOfString);

    delete[]subMnoj;
    subMnoj = NULL;
    delete[]stringMnoj;
    stringMnoj = NULL;
    delete[]countersForMnoj;
    countersForMnoj = NULL;

    return 0;
}