c++类模板,调用结构体模板出错!!
#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
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
求助大侠这是怎么回事?!(以下为几个报错函数的实现)
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; }
<spanstyle="color:#333333;font-family:'MicrosoftYaHei';font-size:14px;line-height:24px;background-color:#F8FEEE;">把实现和类定义放在同一个文件里(#include实现或者直接写在一个文件里),模板和内联一样,分开放的话链接的时候模板没法实例化
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