int MyVector::binarySearch(const MyString& newString) const {
    int begin = 0, end = m_len, middle = 0;
    while (begin < end) {
        middle = (begin + end) / 2;
        cout << m_array[middle] << endl;
        int comp = strcmp(m_array[middle].getStr(), newString.getStr());
        if (comp < 0) {
            begin = middle + 1;
        } else if (comp > 0) {
            end = middle - 1;
        } else return -1;
    }

    return middle;
}