An incomprehensible error occurred when using the class containing the compiled model to compile the template.

Error code:

File 1: Listing list. h

// Configure list. htemplate <typename T> class upload list {public: Upload list ();~ Revoke list (); void clearall (); Private: int * begin; int listcounter;}; # include "counter list. CPP "file 2: Listing list. CPP // configure list. CPP template <typename T> customization list <t> ::~ Counter list () {clearall () ;}template <typename T> counter list <t >:: counter list () {begin = 0; listcounter = 0 ;} template <typename T> void upload list <t >:: clearall (){}

According to the C ++ primer version 4 description of the model containing the compilation (page 1), divide the definition and declaration of the function Template into two files, however, the following error occurs during the compilation test:

Error 1 error c2143: syntax error: Missing ";" (before "<)
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Error 2 error c4430: The type specifier is missing-it is assumed to be Int. Note: C ++ does not support default int
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Error 3 error c2988: Unrecognized template declaration/Definition
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Error 4 error c2059: syntax error: "<"
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Error 5 Error c2588: ": ~ Invalid list ": Invalid global destructor
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Error 6 fatal error c1903: failed to recover from previous errors; stopping Compilation
E: \ document \ Documents \ Visual Studio 2008 \ projects \ test \ documents list. cpp
5 Test
Code after correction:

//linkedlistitem.h#ifndef LINKEDLISTITEM_H#define LINKEDLISTITEM_Hnamespace LinkedList{template<class T>class linkedlist;template<class T>class linkedlistitem{friend class linkedlist<T>;protected:T item;linkedlistitem* preview;linkedlistitem* next;public:linkedlistitem();linkedlistitem(const T& itemin,linkedlistitem*p=0,linkedlistitem*n=0);bool operator ==(const linkedlistitem<T>&)const;bool operator <(const linkedlistitem<T>&)const;bool operator >(const linkedlistitem<T>&)const;bool operator <=(const linkedlistitem<T>&)const;bool operator >=(const linkedlistitem<T>&)const;bool operator !=(const linkedlistitem<T>&)const;void changeitem(const T&);void changethis(linkedlistitem*);//void changethis(linkedlistitem&);linkedlistitem*getpreview(){return preview;}linkedlistitem*getnext(){return next;}};}#include "linkedlistitem.cpp"#endif

# Ifndef define listitem_cpp # include <assert. h> # include "listitem. H "namespace shortlist {// template <class T> // class extends listitem; Template <typename T> extends listitem <t >:: extends listitem () {T * TMP = new T (); item = * TMP; Delete TMP; next = 0; Preview = 0;} template <typename T> define listitem <t> :: inclulistitem (const T & itemin, inclulistitem * p = 0, inclulistitem * n = 0): item (itemin), Preview (P), next (n) {}template <typename T> bool extends listitem <t >:: operator <(const extends list: extends listitem <t> & I) const {return item <I. item;} template <typename T> bool publish listitem <t >:: operator <= (const publish list: publish listitem <t> & I) const {return item <= I. item;} template <typename T> bool extends listitem <t >:: operator> (const extends listitem <t> & I) const {return item> I. item;} template <typename T> bool upload listit Em <t>: Operator >=( const implements listitem <t> & I) const {return item> = I. item;} template <typename T> bool publish listitem <t >:: operator ==( const publish listitem <t> & I) const {return item = I. item;} template <typename T> bool extends listitem <t >:: Operator! = (Const upload listitem <t> & I) const {return item! = I. item;} template <typename T> void upload listitem <t >:: changeitem (const T & I) {This-> item = I ;} template <typename T> void inclulistitem <t >:: changethis (inclulistitem <t> * I) {If (this-> Preview) {This-> preview-> next = I; i-> Preview = This-> preview; I-> next = this; this-> Preview = I;} else {// if it is the first this-> Preview = I; i-> Preview = 0; I-> next = This; }}// template <typename T> // void upload listitem <t> :: changethis (custom listitem <t> & I) /// {/// prevent pointing to the memory that has been released in the stack area. // define listitem <t> * TMP = new synchronized listitem <t> (I. item, I. preview, I. next); // changethis (TMP ); /// // assert (TMP -> getnext ()); // assert (getpreview (); // }}# endif