Question

我创建了一个列表并且它工作得很好，但是我必须使用模板重写它，我已经完成了。但是当我尝试编译我的代码时，我得到链接器错误！你能帮忙解决这个问题吗？任何帮助将非常感激！这是 List.h

#pragma once
#include <cstdlib>

template <class T>
class List
{
public:
struct Node
{
    T data;
    Node  *next, *prev;
    Node();
    Node(T &smth);
    ~Node();
};

Node *head;
Node *tail;
public:
  List();
  ~List();
  void add(T &d);
  void del(Node *);

};

List.cpp

#include "List.h"


template <class T>
List<T>::List()
{

}
template <class T>
List<T>::~List()
{
 Node*n;
 while (head != nullptr)
 {
    n = head->prev;
    delete head;
    head = n;
 }
}
template <class T>
void List<T>::add(T &d)
{
 Node *n = new Node(d);
 n->prev = head;
 n->next = nullptr;
 if (head!=nullptr)
    head->next = n;
 if(head == nullptr){
    head = n;
    tail = head;
 } else 
    head = n;
}
template <class T>
void List<T>::del(Node *node)
{   
 if (head == node)
    head = node->prev;
 if (tail == node)
    tail = node->next;
 if (node->next != nullptr)
    node->next->prev = node->prev;
 if (node->prev != nullptr)
    node->prev->next = node->next;
 delete node;
}

template <class T>
List<T>::Node::Node():data(),next(nullptr),prev(nullptr){}

template <class T>
List<T>::Node::Node(T &smth):data(smth),next(nullptr),prev(nullptr){}

template <class T>
List<T>::Node::~Node(){
 data.~Word();
 next = nullptr;
 prev = nullptr;
}

和 main.cpp

#include <List.h>
#include <iostream>
using namespace std;
int main()
{
 int a;
 List<int> my;
 cin >> a;
 my.add(a);
 cin >> a;
 my.add(a);
 cin >> a;
 my.add(a);
}

我收到了这些错误：

错误1错误LNK2019：未解析的外部符号“public：__thiscall＆gt; List :: List（void）”（?? 0？$ List @ H @@ QAE @ XZ）在函数_main＆gt; c：\ Users中引用\ lapchenko \ documents \ visual studio＆gt; 2012 \ Projects \ ConsoleApplication1 \ ConsoleApplication1 \ Source.obj

错误2错误LNK2019：未解析的外部符号“public：__thiscall＆gt; List :: ~List（void）”（?? 1？$ List @ H @@ QAE @ XZ）在函数_main＆gt; c：\中引用用户\ lapchenko \ documents \ visual studio＆gt; 2012 \ Projects \ ConsoleApplication1 \ ConsoleApplication1 \ Source.obj

错误3错误LNK2019：未解析的外部符号“public：void __thiscall＆gt; List :: add（int＆amp;）”（？add @？$ List @ H @@ QAEXAAH @ Z）在function _main＆gt; c中引用：\ Users \ lapchenko \ documents \ visual studio＆gt; 2012 \ Projects \ ConsoleApplication1 \ ConsoleApplication1 \ Source.obj

错误4错误LNK1120：3个未解析的外部c：\ users \ lapchenko \ documents \ visual＆gt; studio 2012 \ Projects \ ConsoleApplication1 \ Debug \ ConsoleApplication1.exe 1

错误LNK2019：我的Template类中未解析的外部符号

0 个答案: