我試圖模板化一些類(一個LinkedListNode和LinkedList),這樣製作模板類後不是類,名稱空間或枚舉嗎?
template <class T>
class LinkedListNode{
public:
T data;
LinkedListNode *next;
LinkedListNode();
};
在我LinkedList類,我有私有變量:
private:
LinkedListNode *head;
//iterator for traversing the list
LinkedListNode *current;
};
編譯時,我得到奇怪的錯誤:
./LinkedList.h:38:3: error: unknown type name 'LinkedListNode'; did you mean 'LinkedList'? LinkedListNode *head; ^~~~~~~~~~~~~~ LinkedList ./LinkedList.h:13:7: note: 'LinkedList' declared here class LinkedList{ ^ ./LinkedList.h:40:3: error: unknown type name 'LinkedListNode'; did you mean 'LinkedList'? LinkedListNode *current; ^~~~~~~~~~~~~~ LinkedList ./LinkedList.h:13:7: note: 'LinkedList' declared here class LinkedList{ ^ LinkedList.cpp:7:1: error: 'LinkedListNode' is not a class, namespace, or enumeration LinkedListNode::LinkedListNode(){ ^ ./LinkedList.h:5:7: note: 'LinkedListNode' declared here class LinkedListNode{ ^
爲什麼會出現這些錯誤,如果它說我的一個LinkedListNode也正在申報?