error: no matching function for call to 'TNode<Student>::TNode<const Student&)'

Question

每当我想在 C++ 上使用模板在二叉树上添加一个元素时，我就会遇到这个错误，而且我很难修复它，

所以我的代码是 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

而且每当我尝试编译时我都会收到错误消息说，

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

Tree.c:140: 错误：没有匹配函数来调用 'TNode::TNode(const Student&)'

Tree.c:48: 注意：候选人是：TNode::TNode(const Whatever&, TNode&) [with Whatever = Student]

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

Tree.c:31: 注意: TNode::TNode(const TNode&)

有人知道如何解决这个错误吗？？

Answer 1

您的两个 TNode 构造函数都有两个参数。你只过了一个。

error: no matching function for call to 'TNode<Student>::TNode<const Student&)'

error: no matching function for call to 'TNode<Student>::TNode<const Student&)'

c++

binary-tree

linked-list

nodes