if(_capacity == 0)
    {
        AStack *newStack = new AStack[_capacity+1];
        for(int i=0; i < _size; ++i)
        {
            newStack->_theArr[i] = _theArr[i];
        }
        newStack->_theArr[_size] = value;
        //_theArr = newStack->_theArr;
        delete [] _theArr;
    }
    else
    {
        _theArr[_size] = value; // orsakar heap error
        _size += 1;
    }