LNK2019 unresolved external symbol problem

Hi,

I'm new to c++ and have an issue with the LNK2019 error. I've done some googling and as of yet haven't found a solution to my problem. So here I am!!

The exact error I receive is: error LNK2019: unresolved external symbol "public: void __thiscall ProductInfo::create_product(int)" (?create_product@ProductInfo@@QAEXH@Z) referenced in function _wmain OOSD_Assignment.obj OOSD_Assignment

Essentially as soon as I add any datetypes to the function call's in the .h file it throws a wobbler, e.g. here: void create_product(int);



and the code for you:

ProductInfo.h ----->

#include "stdafx.h"
#include <iostream>
//#include <windows.h>
#include <string.h>
using namespace std;

class ProductInfo
{
public:

//std::string inp_model;


void create_product(int);

};



ProductInfo.cpp ------>

//ProductInfo.cpp - Our class that holds information about the products

#include "stdafx.h"
#include <iostream>
//#include <string.h>
using namespace std;

int price;

void create_product(int input_price) {
price = input_price;

}



Project1.cpp -------->


#include "stdafx.h"
#include "ProductInfo.h"
#include <iostream>
#include <string.h>

//int argc, _TCHAR* argv[]

using namespace std;

int _tmain()
{

//std::string xx("hello");
int xx = 100293;
ProductInfo test;

test.create_product(xx);


return 0;
}



Cheers.

Dave

create_product is defined as a member of ProductInfo, but not implemented that way.

Would you mind elaborating GCDEF? An example would be useful.

Cheers,

Dave.

This

Code:

---

void create_product(int input_price) {
price = input_price;

}

---

needs to be

Code:

---

void ProductInfo::create_product(int input_price) {
price = input_price;

}

---

to indicate that your implementation is a member of the ProductInfo class.

Ahh, that figures. I do however get a different error now:

error C2653: 'ProductInfo' : is not a class or namespace name

Any ideas on how I'd go about fixing that one?

Ta,

Dave.

never mind. I hadn't included the header file either.

Thanks for all your help.