string* allocateAndCopyToNewArray( string* pOldArray, int oldNumEntries, int newCapacity )
{
    string* str = new string[newCapacity];

    if(newCapacity > oldNumEntries)
    {
        std::copy(mWords, mWords+oldNumEntries, str);
    }
    else
    {
        std::copy(mWords, mWords+newCapacity, str);
    }
    return str;
}

void DynamicArray::resize( int newCapacity )
{
    string *str = allocateAndCopyToNewArray(mWords, mNumWords, newCapacity);

    delete [] mWords;
    mCapacity = newCapacity;
    mWords = str;
}