Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

CGPSArray illegal reference to data member

Posted on 2004-08-03
17
283 Views
Last Modified: 2013-11-20
class CGPSArray : public CStringArray

m_pGPSArray = new CGPSArray();
if (m_pGPSArray->AddGPSArray(sFileName, CAVIThread::lFrame1) > 1)
                        bIsGPSArray = TRUE;

error C2597: illegal reference to data member 'CAVIThread::lFrame1' in a static member function

Whats wrong with that?
0
Comment
Question by:Zmey2
  • 8
  • 4
  • 2
17 Comments
 
LVL 16

Accepted Solution

by:
nonubik earned 500 total points
ID: 11701330
Seems that you are inside a static method and lFrame1 is not a static member. Make it static. Or create an instance of the class and use a member-access operator.
0
 
LVL 5

Expert Comment

by:lwinkenb
ID: 11701378
Is lFrame1 a static variable?
If not, then that is your problem.  To access a non-static member variable, you must instantiate a class first.

In other words:
CAVIThread ct;
ct.lFrame1 = whatever;

If you want to use the member variable as in CAVIThread::lFrame1, then you need to make that variable static.

class CAVIThread
{
  static int lFrame1;
  //...
};
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11701445
do I hear an echo?
0
Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 5

Expert Comment

by:lwinkenb
ID: 11701573
Your post was not there when I posted mine.  
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11701587
Then I must appologize.
0
 
LVL 4

Author Comment

by:Zmey2
ID: 11703159
got error C2512: CAVIThread ct;
LONG lFrame;

lFrame = ct.lFrame1;
if (m_pGPSArray->AddGPSArray(sFileName, lFrame) > 1)

error C2512: 'CAVIThread' : no appropriate default constructor available

I think thare is a problem connected with that fact, that i've got  lFrame1 in AVIViewer.cpp, and CAVIThread::lFrame1 in MainFrm.cpp...
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11703193
try declaring

static LONG lFrame;

in your AVIThread.h
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11703203
static LONG lFrame1;

in your CAVIThread class definition
0
 
LVL 4

Author Comment

by:Zmey2
ID: 11703766
Doesn't help :(


Linking...
AVIThread.obj : error LNK2001: unresolved external symbol "public: static long  CAVIThread::lFrame1" (?lFrame1@CAVIThread@@2JA)
MainFrm.obj : error LNK2001: unresolved external symbol "public: static long  CAVIThread::lFrame1" (?lFrame1@CAVIThread@@2JA)
Debug/AVIViewer.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11703804
ok. you need to define it
in AVIThread.cpp, after include lines

LONG CAVIThread::lFrame1 = 0;

Put this line before any class method.
0
 
LVL 4

Author Comment

by:Zmey2
ID: 11712682
>ok. you need to define it
>in AVIThread.cpp, after include lines

>LONG CAVIThread::lFrame1 = 0;

>Put this line before any class method.

Can you expand on this, please?
0
 
LVL 4

Author Comment

by:Zmey2
ID: 11733172
Hi, nonubik!

Will you kindly be more specific on your last advice? Unfortunately, i can't give it a try - some things are not understood...
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11771876
I was on vacation...

A static member variable must be declared. See http://msdn.microsoft.com/library/en-us/vccelng/htm/class_27.asp for more info
0
 
LVL 16

Expert Comment

by:nonubik
ID: 11771880
"A static member variable must be declared"
must be read
"A static member variable must be defined"  :)
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question