What is wrong with my C++ code?

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I am using Visual Studio 2008 Professional on Windows and G++ on Unix. My program compiles in both of them. I have the following class definition in my header file:

 

template

class SearchableList: public list

{

 

public:

*** int count(_Ty needle, int start = 0);

*** bool inList(_Ty needle, int start = 0);

*** void cycle();

*** void rcycle();

 

};

 

I wrote the SearchableList class to extend the C++ list class because I needed more functionality than it provided and I wanted to familiarize myself with the C++ list class. This is the first time I have ever used inheritance, so it took a few hours of googling stuff and trial and error to create external member functions for the class that would compile.

 

I have the member functions in a searchableList.cpp file, which has the following code:

 

#include "header.h"

 

template

int SearchableList::count(_Ty needle, int start)

{

 

*** int answer = 0, i;

 

*** //Make sure that starting variable is within range of list

*** start %= this->size();

 

*** for ( i = 0 ; i < start ; i++ )

*** {

 

*** *** this->cycle();

 

*** }

 

*** for (* ; i < this->size() ; i++ )

*** {

 

*** *** // Check to see if we have a match

*** *** if (this->front() == needle) answer++;

 

*** *** // Cycle List

*** *** this->cycle();

 

*** }

 

*** return answer;

 

}

 

template

bool SearchableList::inList(_Ty needle, int start)

{

 

*** return (this->count(needle, start) > 0);

 

}

 

template

void SearchableList::cycle()

{

 

*** this->push_back(this->front());

*** this->pop_front();

***

}

 

template

void SearchableList::rcycle()

{

 

*** this->push_front(this->back());

*** this->pop_back();

***

}

 

My program relies on (most) of this classes' member functions. It compiles without a problem, whenever the linker is run, I get a linker error. I have been using workarounds that rely on the parent classes' methods, but it is getting to the point where I cannot do this anymore and I must to be able to use this classes' member functions. Here is an example of a linker error that comes from using one of the member functions:

 

1>recordArray.obj : error LNK2019: unresolved external symbol "public: bool __thiscall SearchableList::inList(int,int)" (?inList@?$SearchableList@HV?$allocator@H@std@@@@QAE_NHH@Z) referenced in function "public: class SearchableList __thiscall RecordArray::getSemesterList(class std::basic_string const &)const " (?getSemesterList@RecordArray@@QBE?AV?$SearchableList@V?$

basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@

@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$

allocator@D@2@@std@@@2@@@ABV?$basic_string@DU?$char_traits

@D@std@@V?$allocator@D@2@@std@@@Z)

1>C:\Documents and Settings\Richard\My Documents\Visual Studio 2008\Projects\hw4\Debug\hw4.exe : fatal error LNK1120: 1 unresolved externals

 

Note: I added a few newlines to the above text to make it fit in channel9's post area.

 

I also get a similar linker error from G++ on Unix:

 

g++ -o hw4.out main.o read.o record.o recordArray.o recordList.o searchableList.o

Undefined********************** first referenced

*symbol**************************** in file

SearchableList::inList(int, int)recordArray.o

ld: fatal: Symbol referencing errors. No output written to hw4.out

collect2: ld returned 1 exit status

*** Error code 1

make: Fatal error: Command failed for target `project'

 

Would someone please tell me what is wrong?

 

 

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