Little update of stack class.

template<typename T> class CStack {
public:
    static enum {CStack_StackEmpty, CStack_BadMemory};

    unsigned int size()
    {
        return StackSize;
    }

    bool empty()
    {
        return StackSize == 0;
    }

    T pop()
    {
        if(StackIter == 0) throw (int)CStack_StackEmpty;

        return _Stack[--StackIter];
    }

    void push(T j)
    {
        if(StackSize >= StackIter && _Stack != 0)
        {
            T* _newstack = (T*)malloc(sizeof(T) * (StackSize + 1));

            if(_newstack == NULL)
            {
                free(_newstack);
                this->~CStack();
                throw (int)CStack_BadMemory;
            }

            for(int i=0;i<StackSize;i++)
                _newstack[i] = _Stack[i];

            free(_Stack);

            _Stack = _newstack;
        }
        else if (_Stack == 0)
        {
            _Stack = (T*)malloc(sizeof(T) * (StackSize == 0 ? 1 : StackSize));
            if(_Stack == 0)
            {
                this->~CStack();
                throw (int)CStack_BadMemory;
            }
        }

        _Stack[StackSize++] = j;

        StackIter = StackSize;

    }

    void clear()
    {
        StackIter = 0;
    }

    void allclear() // useless
    {
        free(_Stack);
        StackIter = StackSize = 0;
    }

    CStack()
    {
        StackIter = StackSize = 0;
        _Stack = NULL;
    }

    ~CStack()
    {
        free(_Stack);
        StackIter = StackSize = 0;
    }

private:
    unsigned int StackSize, StackIter;
    T* _Stack;
};