类定义嵌套+模板,为什么不认识?
[code=C/C++][template <typename T>
class List
{
private:
class Node
{
public:
Node(const T& d):data(d),next(NULL){};
Node():next(NULL){};
private:
Node* next;
T data;
};
Node* head;
int size;
public:
List(int); //constructor
List(int,T); //overload constructor
List(List&); //copy constructor哎呀,我还不会实现~~
void assign(T);
T Back();
Node* Back();
Node* Begin();
bool Empty();
int Size();
void Insert(int,T);
void Clear();
void Pop_back();
void Pop_front();
void Push_front(T);
void Push_back(T);
void Remove(T);
void Resize(int,T);
void Sort();
void Merge(List const&);
void Print();
};]
实现函数时,编译器死活都不认识 Node* Back(); Node* Begin();了,说Node不认识,连T都不认识了!
帮帮忙,谁能解答一下呢?