Problems with LNK2019

[solarin]

Im having several problems with the error LNK2019.

I ve a class that derives from another:


//controller.h

#include MessagesNotifie r_Client

class Controller : public MessagesNotifie r_Client
{
public:

Controller();
~Controller();

void TempVerificatio n(int a, int b);
};


//controller.cpp

Controller::Con troller(){}
Controller::~Co ntroller(){}

void TempVerificatio n(int a, int b)
{
if ( abs(a - b) 23 ){
NotifyWarningMe ssage("warning" );

}



NotifyWarningMe ssage is a method defined in MessagesNotifie r_Client.


Im using Visual Studio .net 2003. and I have a Solution with 2
projects. The controller class is in
the project A, and the MessagesNotifie r_Client in project B:

===Solution "BigTest" (2 projects)
== - A
|
------ Controller.h
------ Controller.cpp
== - B
|
------ MessagesNotifie r_Client.cpp
------ MessagesNotifie r_Client.h



Any ideas where is the problem, or how I should configure VisualStudio?


Thanks for your support.

[solarin]

Re: Problems with LNK2019


solarin wrote:

Im having several problems with the error LNK2019.
>
I ve a class that derives from another:
>
>
//controller.h
>
#include MessagesNotifie r_Client
>
class Controller : public MessagesNotifie r_Client
{
public:
>
Controller();
~Controller();
>
void TempVerificatio n(int a, int b);
};
>
>
//controller.cpp
>
Controller::Con troller(){}
Controller::~Co ntroller(){}
>
void TempVerificatio n(int a, int b)
{
if ( abs(a - b) 23 ){
NotifyWarningMe ssage("warning" );
>
}
>
>
>
NotifyWarningMe ssage is a method defined in MessagesNotifie r_Client.
>
>
Im using Visual Studio .net 2003. and I have a Solution with 2
projects. The controller class is in
the project A, and the MessagesNotifie r_Client in project B:
>
===Solution "BigTest" (2 projects)
== - A
|
------ Controller.h
------ Controller.cpp
== - B
|
------ MessagesNotifie r_Client.cpp
------ MessagesNotifie r_Client.h
>
>
>
Any ideas where is the problem, or how I should configure VisualStudio?
>
>
Thanks for your support.

The line where LNK2019 apears is where NotifyWarningMe ssage method is
called.

[Jerry Coffin]

Re: Problems with LNK2019

In article <1155022028.046 177.209940@i42g 2000cwa.googleg roups.com>,
en.navarro@gmai l.com says...

[ ... ]

class Controller : public MessagesNotifie r_Client

[ ... ]

void TempVerificatio n(int a, int b);

Here you've declared a class member function.

//controller.cpp

[ ... ]

void TempVerificatio n(int a, int b) {

But here you're defining a free function. You almost certainly want this
to be something like:

void Controller::Tem pVerification(i nt a, int) {
// ...

--
Later,
Jerry.

The universe is a figment of its own imagination.

[solarin]

Re: Problems with LNK2019


Jerry Coffin ha escrito:

You almost certainly want this
to be something like:
>
void Controller::Tem pVerification(i nt a, int) {
// ...
>

sorry , it was my mistake. The method is implemented as you mentioned:

void Controller::Tem pVerification(i nt a, int b)
{
if ( abs(a - b) 23 ){
NotifyWarningMe ssage("warning" ); // LNK2019 error here

}

The error is when i'm calling the method NotifyWarningMe ssage.

Thanks.

[Ian Collins]

Re: Problems with LNK2019

solarin wrote:

Im having several problems with the error LNK2019.
>

What's one of those? Show the error message, 'LNK2019' means nothing to
someone who doesn't use your tools.

I ve a class that derives from another:
>
//controller.h
>
#include MessagesNotifie r_Client
>
class Controller : public MessagesNotifie r_Client
{
public:
>
Controller();
~Controller();
>
void TempVerificatio n(int a, int b);
};
>
>
//controller.cpp
>
Controller::Con troller(){}
Controller::~Co ntroller(){}
>
void TempVerificatio n(int a, int b)
{
if ( abs(a - b) 23 ){
NotifyWarningMe ssage("warning" );
>
}
>
NotifyWarningMe ssage is a method defined in MessagesNotifie r_Client.
>

You probably haven't linked the two compilation units to form your
executable.

--
Ian Collins.

[solarin]

Re: Problems with LNK2019


Ian Collins wrote:

What's one of those? Show the error message, 'LNK2019' means nothing to
someone who doesn't use your tools.

Controller.obj : error LNK2019: símbolo externo "public: void
__thiscall MessagesNotifie r_Client::Notif yWarningMessage (char const *)"
(?NotifyWarning Message@Message sNotifier_Clien t@@QAEXPBD@Z) sin resolver
al que se hace referencia en la función "public: void __thiscall
Controller::Tem pVerification(i nt,int)"
(?ComprobarPres ion@BometContro ller@@QAEXMM@Z)
...\..\..\..\.. \Bin\Win32\VC7\ Release/GMETEO-GestorMeteorolo gico.exe :
fatal error LNK1120: 1 externos sin resolver

simbolo externo = External Symbol
sin resolver al que se hace referencia en la funcion = not resolved to
that one refers in the function

externos sin resolver = external not resolved

[Ian Collins]

Re: Problems with LNK2019

solarin wrote:

Ian Collins wrote:
>
>

>>What's one of those? Show the error message, 'LNK2019' means nothing to
>>someone who doesn't use your tools.

>
>
Controller.obj : error LNK2019: símbolo externo "public: void
__thiscall MessagesNotifie r_Client::Notif yWarningMessage (char const *)"
(?NotifyWarning Message@Message sNotifier_Clien t@@QAEXPBD@Z) sin resolver
al que se hace referencia en la función "public: void __thiscall
Controller::Tem pVerification(i nt,int)"
(?ComprobarPres ion@BometContro ller@@QAEXMM@Z)
..\..\..\..\..\ Bin\Win32\VC7\R elease/GMETEO-GestorMeteorolo gico.exe :
fatal error LNK1120: 1 externos sin resolver
>
simbolo externo = External Symbol
sin resolver al que se hace referencia en la funcion = not resolved to
that one refers in the function
>
externos sin resolver = external not resolved
>

Sure looks like you haven't linked the two cpp files you mentioned to
form your executable.

How you do this is off topic here, you'll get more help on a windows
programming group.

--
Ian Collins.

[RKS]

Re: Problems with LNK2019


solarin wrote:

Im having several problems with the error LNK2019.
>
I ve a class that derives from another:
>
>
//controller.h
>
#include MessagesNotifie r_Client
>
class Controller : public MessagesNotifie r_Client
{
public:
>
Controller();
~Controller();
>
void TempVerificatio n(int a, int b);
};
>
>
//controller.cpp
>
Controller::Con troller(){}
Controller::~Co ntroller(){}
>
void TempVerificatio n(int a, int b)
{
if ( abs(a - b) 23 ){
NotifyWarningMe ssage("warning" );
>
}
>
>
>
NotifyWarningMe ssage is a method defined in MessagesNotifie r_Client.
>
>
Im using Visual Studio .net 2003. and I have a Solution with 2
projects. The controller class is in
the project A, and the MessagesNotifie r_Client in project B:
>
===Solution "BigTest" (2 projects)
== - A
|
------ Controller.h
------ Controller.cpp
== - B
|
------ MessagesNotifie r_Client.cpp
------ MessagesNotifie r_Client.h
>
>
>
Any ideas where is the problem, or how I should configure VisualStudio?
>
>
Thanks for your support.

Assuming Lnk2019 is a linker error for missing functions, I suggest try
adding your project A (where your functions is declared) as a reference
to project B( where you are using the function).