Visual Studio C++ 2010 in-project link error

Question

I have a multi-file project in VSC++2010, but for some reason it won't link some of them properly.

For example, I have CParser.h and CParser.cpp . CParser.h is just some function declarations:

#pragma once
#include <string>

void parseArg(int argc, char* argv[], GVar gv);
void parseCfg(string cfg, GVar gv)

CParser.cpp just contains implementations:

#include <cstdio>
#include <fstream>
#include <cstring>
#include <string>
#include "_GlobalVar.h" //defines GVar, not relevant
#include "CParser.h"

void parseArg(int argc, char* argv[], GVar &gv) {
    /*not really relevant*/
}

And the error:

main.obj : error LNK2019: unresolved external symbol "void __cdecl parseArg(int,char * * const,class GVar)" (?parseArg@@YAXHQAPADVGVar@@@Z) referenced in function _SDL_main

Edit:

There's also this other problem:

template<class T>
void RDAMHandler<T>::clean() {
    long i;
    while(!avtick.empty())
        avtick.pop();
    for(i = v.size() - 1; i >= 0; i--) {
        delete all[i];
        all.pop_back();
        v.pop_back();
    }
}

And the declaration:

template<class T>
class RDAMHandler {
    vector<T*> all;
    priority_queue<long> avtick;
    vector<bool> v;
public:
    T &operator[](long x);
    long insert(T &x);
    void del(long x);
    void clean();
};

I don't see any difference here; what is the problem?

Edit edit: And error

main.obj : error LNK2019: unresolved external symbol "public: void __thiscall RDAMHandler::clean(void)" (?clean@?$RDAMHandler@USDL_Surface@@@@QAEXXZ) referenced in function "void __cdecl cleanUp(class GVar)" (?cleanUp@@YAXVGVar@@@Z)

Answer 1

In CParser.cpp

I think You have to use statement

void CParser::parseArg(int argc, char* argv[], GVar &gv)

instead of

void parseArg(int argc, char* argv[], GVar &gv) in CParser.cpp file

And In CParser.h

The declaration should be changed to void parseArg(int argc, char* argv[], GVar &gv);

And For Next Error

For Reference Please Go through this 1. Template using class

Hope this will help you.