Stack.Pop() using LinkedList

只是为了让你们都知道这是一个家庭作业问题，我花了几个小时试图弄清楚这件小事。我的pop()不起作用。这是我当前的pop():代码

StackElement Stack::Pop(){
Position temp;
temp = stack.CurrentEntry();
stack.Delete();
return temp;}

我使用的是Delete()，这是一个基于链表的delete()函数，如下所示：

void LinkedList::Delete(){
if (current == first && AtEnd()){
    // Remove the memory allocation for the element's data
    delete &current->data;
    // Reset all values of the linked list to original (null) state
    current = NULL;
    pred = NULL;
    first = NULL;
}
else 
    // Checks if the current element is the first node in the lists
    if (current == first){
        // Make new first element to be the next element
        first = current->next;
        // Remove the memory allocation for the element's data
        delete &current->data;
        // The new current entry is the successor of the deleted node.
        current = first;
    }
    // When the element you're deleting is not the first node in list
    else{
        assert(!Empty());
        // Temporary node to prevent current from being marroned
        Node *tempNode = current->next;
        pred->next = tempNode;
        // Remove the memory allocation for the element's data
        delete &current->data;
        current = tempNode;
    }
}

当我编译时，它会在这里给我一个错误：

Program5_test.exe中0x003E5F79处未处理的异常：0xC0000005：写入位置0xF495EE12的访问冲突。