当我尝试在链接列表的末尾添加一个项目时，它显示分段错误（核心转储）
下面是代码

LinkedList :: LinkedList()
{
    head = NULL;
}

void LinkedList :: InsertItem(int data)
{
    Node *new_node;
    new_node = new Node;
    new_node -> data = data;
    new_node -> next = NULL;

    new_node -> next = head;
    head = new_node;

    cout<<"Node Added"<<"\n";
}

void LinkedList :: Display()
{
     Node *curr;
     curr = head;

    while(curr != NULL)
    {
    cout<<curr->data<<"\t";
    curr = curr -> next;
    }
}

void LinkedList :: AddLast(int data)
{
     Node *new_node = new Node;
     new_node -> data = data;
     new_node -> next = NULL;

     Node *curr = head;
     while (curr != NULL)
     { 
    curr = curr -> next;
     }

     curr -> next = new_node;

}

当我运行这个程序时，它说
Segmentation fault (core dumped)
我正在尝试实现这个没有尾节点的链表。那么我应该怎么做呢？