我创建一个链表类时遇到了一个奇怪的问题。 [英] I met a strange problem when I create a linked list class .

问题描述

--------------------------------------这是我的代码----- -----------------------------------

  #ifndef _LIST_H_ 
  ＃define _LIST_H_ 
  模板< typename t =  > 
  struct  Num {
 T num; 
 Num * next; 
}; 
  template < typename t =   > 
  class 列表{
 私人：
 Num< t> * PHEAD; 
  public ：
 List（）; 
  int  count（）; 
  void  create（T * a， int  n）; 
  void  list_（）; 
  void  add（T key， int  n）; 
  void  Swapat（ int  a， int  b）; 
  void  Swapnum（T num1，T num2）; 
 int& at（ int  n）; 
  void  Sort（）; 
  void  del（ int  n）; 
  void  delTheSame（）; 
 
}; 
 ＃endif  

------- ------------并且，一些成员函数如下：-----------------------

 模板< typename t =  > 
 List< t> :: List（）{
 pHead = NULL; 
} 
 模板< typename t =  > 
  void 列表< t> :: create（T * a， int  n）{
 Num< t> * pTail = NULL; 
  for （ int  i =  0 ; i< n; ++ i）{
 Num< t> * t =  new  Num< t> ;; 
 t-> num = a [i]; 
 t-> next = NULL; 
  if （pHead == NULL）{
 pHead = t; 
 pTail = pHead; 
} 
 其他 {
 pTail-> next = t; 
 pTail = t; 
} 
} 
} 
 模板< typename t =   > 
  void 列表< t> :: list_（）{
 Num< t> * t = pHead; 
  while （t！= NULL）{
 cout<< t-> num<<  ; 
 t = t-> next; 
} 
 cout<< ENDL; 
} 

------------------------------ ----但是，问题来了------------------------------------------ -

严重级代码描述项目文件行
错误LNK1120 3未解析的外部测试C：\Users\Sar.Kerson \Desktop\Test1 \\ \\Test \Debug \ Test.exe 1 
严重级代码说明项目文件行
错误LNK2019未解析的外部符号public：__thiscall List :: List（void）（?? 0？$ List @功能主要测试C中引用了H @@ QAE @ XZ：\ Users \Sar.Kerson \Desktop\Test1\Test \Test \ main.obj 1 
严重性代码描述项目文件行
错误LNK2019未解析的外部符号public：void __thiscall List :: create（int *，int）（？create @？$ List @ H @@ QAEXPAHH @ Z）在函数_main中引用测试C：\ Users \Sar.Kerson \Desktop\Test1\Test \Test \ main.obj 1 
严重性代码说明项目文件行
错误LNK2019未解析的外部sym bolpublic：void __thiscall List :: list（void）（？list _ @？$ List @ H @@ QAEXXZ）在函数_main测试C中引用：\ Users \Sar.Kerson \Desktop\Test1 \ Test\Test\main.obj 1 

------------------------- - - - - - - 请帮忙 - - - - - - - - - - - - - - - - - - -----------



我尝试了什么：



如果我不使用模板，我可以运行。

我不知道如何解决问题。

你能告诉我吗？怎么做。

解决方案

List @ H @@ QAE @ XZ）在函数main test C中引用：\ Users \Sar.Kerson \Desktop \\ \\ Test1\Test \Test \ main.obj 1
严重性代码说明项目文件行
错误LNK2019未解析的外部符号public：void __thiscall List :: create（int *，int）（ ？create @？

List @ H @@ QAEXPAHH @ Z）在函数_main测试C中引用：\ Users \Sar.Kerson \Desktop \ Test1 \Test \Test \ main.obj 1
严重性代码说明项目文件行
错误LNK2019未解析的外部符号public：void __thiscall List :: list（void）（？list_函数_main中引用的@？

List @ H @@ QAEXXZ测试C：\ Users \Sar.Kerson \Desktop\Test1 \Test \Test \ main .obj 1

-------------------------------- - - -请帮忙 - - - - - - - - - - - - - - - - - - - - - - ----



我尝试了什么：



如果我不要使用模板，我可以运行。

我不知道如何解决问题。

你能告诉我怎么做。

--------------------------------------Here are my codes----------------------------------------

#ifndef _LIST_H_
#define _LIST_H_
template <typename t="">
struct Num {
    T num;
    Num *next;
};
template <typename t="">
class List {
private:
    Num<t>* pHead;
public:
    List();
    int count();
    void create(T *a, int n);
    void list_();
    void add(T key, int n);
    void Swapat(int a, int b);
    void Swapnum(T num1, T num2);
    int& at(int n);
    void Sort();
    void del(int n);
    void delTheSame();

};
#endif

-------------------And, some of the member functions are as following:-----------------------

template <typename t="">
List<t>::List() {
    pHead = NULL;
}
template <typename t="">
void List<t>::create(T *a, int n) {
    Num<t> *pTail = NULL;
    for (int i = 0; i < n; ++i) {
        Num<t> *t = new Num<t>;
        t->num = a[i];
        t->next = NULL;
        if (pHead == NULL) {
            pHead = t;
            pTail = pHead;
        }
        else {
            pTail->next = t;
            pTail = t;
        }
    }
}
template <typename t="">
void List<t>::list_() {
    Num<t> *t = pHead;
    while (t != NULL) {
        cout << t->num << " ";
        t = t->next;
    }
    cout << endl;
}

----------------------------------But, problems came-------------------------------------------

Severity Code Description Project File Line
Error LNK1120 3 unresolved externals Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Debug\Test.exe 1
Severity Code Description Project File Line
Error LNK2019 unresolved external symbol "public: __thiscall List::List(void)" (??0?$List@H@@QAE@XZ) referenced in function main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1
Severity Code Description Project File Line
Error LNK2019 unresolved external symbol "public: void __thiscall List::create(int *,int)" (?create@?$List@H@@QAEXPAHH@Z) referenced in function _main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1
Severity Code Description Project File Line
Error LNK2019 unresolved external symbol "public: void __thiscall List::list(void)" (?list_@?$List@H@@QAEXXZ) referenced in function _main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1

-------------------------------------Please help-----------------------------------------------

What I have tried:

if I don't use the template, I can run.
I don't know how to solve the problem.
Could you please tell me how to do this.

解决方案

List@H@@QAE@XZ) referenced in function main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1 Severity Code Description Project File Line Error LNK2019 unresolved external symbol "public: void __thiscall List::create(int *,int)" (?create@?

List@H@@QAEXPAHH@Z) referenced in function _main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1 Severity Code Description Project File Line Error LNK2019 unresolved external symbol "public: void __thiscall List::list(void)" (?list_@?

List@H@@QAEXXZ) referenced in function _main Test C:\Users\Sar.Kerson\Desktop\Test1\Test\Test\main.obj 1

-------------------------------------Please help-----------------------------------------------

What I have tried:

if I don't use the template, I can run.
I don't know how to solve the problem.
Could you please tell me how to do this.

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