错误：调用'TNode<Student>::TNode<const Student&)'没有匹配函数

Question

每当我想使用C++上的模板在二进制树上添加元素时，我都会遇到这个错误，而且我很难修复它，

这是我的代码是Tree.c文件：

template <class Whatever>
ostream & operator << (ostream &, const TNode<Whatever> &);
template <class Whatever>
struct TNode {
    long balance;
    Whatever data;
    long height;
    TNode<Whatever>* left;
    long & occupancy;
    TNode<Whatever>* right;
    unsigned long & tree_count;
    TNode (const Whatever & element, Tree<Whatever> & theTree)
           :balance (0), data (element), height(0), left(0), 
           occupancy(theTree.occupancy), right(0),
           tree_count (theTree.tree_count) {
                occupancy++;
    }
    TNode (const Whatever & element, TNode<Whatever> & parentTNode)
     : balance(0), data (element), height (0), left (0),
            occupancy(parentTNode.occupancy), right (0),
            tree_count (parentTNode.tree_count) {
              occupancy++;
    }

template <class Whatever>
unsigned long Tree<Whatever> :: Insert (const Whatever & element) {
    //check to see if the tree is empty
    if(root == NULL)
    {  
         root = new TNode<Whatever>(element); //this is keep on giving me the no 
                                              //matching function error
         return TRUE;
    }
    return FALSE;
}

这是我的Tree.h文件：

template <class Whatever>
struct TNode;
template <class Whatever>
class Tree {
    friend struct TNode<Whatever>;
    long occupancy;
    TNode<Whatever> * root;
    unsigned long tree_count;
    static int debug;
public:
    //here are my constructor and destructor
    unsigned long Insert (const Whatever &);

这是我的Driver.h文件：

class Student {
    friend ostream & operator << (ostream &, const Student &);
    char name[20];
    long studentnum;
public:
       //here are my constructor,copy constructor, and deconstructor

每当我试图编译时，我总是收到错误消息，说

Tree.c：在成员函数'long unsigned int Tree:：Insert（const Whatever&）[withWhatever=Student]：

Tree.c:140:错误：没有用于调用"TNode:：TNode（const Student&）"的匹配函数

Tree.c:48：注意：候选者是：TNode:：TNode（const Whatever&，TNode&）[withWhatever=Student]

Tree.c:40:注意：TNode:：TNode（const Whatever&，Tree&）[withWhatever=Student]

树.c:31:注意：TNode:：TNode（const TNode&）

有人知道如何修复这个错误吗？？

Answer 1

两个TNode构造函数都接受两个参数。你只通过了一个。