C / C++ / MFC Discussion Boards

StefanRMB8-Nov-07 4:01

8-Nov-07 4:01

Hi !

I have a small problem with CArray.
I have some different places ( number not available ) where I measure temperatures every minute.
Now I want to store these temperatures in a CArray.

class CTempReader
{
struct GRAPH_POINTS // Holds the information of Temperature, Time and Date
{
int Temperature;
CString Date;
CString Time;
} St_Graph_Points;

struct TEMP_POINTS // Holds all temperatures of one place
{
CArray<graph_points,graph_points> TempZone;
} St_Temp_Points;

private:
CArray<temp_points,temp_points> TempZone; // The different places
}

If I try to compile these I get the following error:
C:\Programme\Microsoft Visual Studio 8\VC\atlmfc\include\afxtempl.h(272) : error C2248: "CObject::CObject": Kein Zugriff auf private Member, dessen Deklaration in der CObject-Klasse erfolgte.
C:\Programme\Microsoft Visual Studio 8\VC\atlmfc\include\afx.h(553): Siehe Deklaration von 'CObject::CObject'
C:\Programme\Microsoft Visual Studio 8\VC\atlmfc\include\afx.h(524): Siehe Deklaration von 'CObject'
Diese Diagnose trat in der vom Compiler generierten Funktion "CArray<type,arg_type>::CArray(const CArray<type,arg_type> &)" auf.
with
[
TYPE=CCSVReader::GRAPH_POINTS,
ARG_TYPE=CCSVReader::GRAPH_POINTS
]

Any idea how to solve ?
This is the last part of a big program and I dont know how to solve it.

Thanks
Stefan

Re: CArray problem

jhwurmbach8-Nov-07 4:14

jhwurmbach

8-Nov-07 4:14

StefanRMB wrote:
Any idea how to solve ?

Your post misses the < and > because codeproject thought they belong to some HTML-Tags and filtered them.
Please change your message to use the pre-tag.

Or better:
Use std::vector<GRAPH_POINTS>.

CArray is some sort of malformed older brother of the vector.
It is mostly hidden in the dark, because Microsoft is so ashamed of it. They had to invent it back when teir compiler only barely handeled templates.

Let's think the unthinkable, let's do the undoable, let's prepare to grapple with the ineffable itself, and see if we may not eff it after all.
Douglas Adams, "Dirk Gently's Holistic Detective Agency"

Re: CArray problem

David Crow8-Nov-07 5:30

David Crow

8-Nov-07 5:30

You seem to have omitted some important code, or this is a VS200x-specific problem.

I compiled this with VS6 just fine:

#include <afxtempl.h>
 
class CTempReader
{
    struct GRAPH_POINTS // Holds the information of Temperature, Time and Date
    {
        int Temperature;
        CString Date;
        CString Time;
    } St_Graph_Points;
 
    struct TEMP_POINTS // Holds all temperatures of one place
    {
        CArray<GRAPH_POINTS, GRAPH_POINTS> TempZone;
    } St_Temp_Points;
 
private:
        CArray<GRAPH_POINTS, GRAPH_POINTS> TempZone; // The different places
};

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: CArray problem

StefanRMB8-Nov-07 20:02

StefanRMB

8-Nov-07 20:02

Hi again,

I found out that these code is not the problem. The problem is the following:

TEMP_POINTS MyTempPoints;

for( int i=0; i < MaxPoints; i++ )
{
TempZone.Add( MyTempPoints );
}

Any idea why ?

Regards
Stefan

Re: CArray problem

BadKarma8-Nov-07 20:44

BadKarma

8-Nov-07 20:44

Hi Stefan,

I think that CArray can only works with CObject. Can you try to derive youre structures like TEMP_POINTS from CObject.

But like the jhwurmbach said, you should try to use std::vector instead.

codito ergo sum

Re: CArray problem

David Crow9-Nov-07 4:44

David Crow

9-Nov-07 4:44

StefanRMB wrote:
TempZone.Add( MyTempPoints );

Since TempZone is a member of TEMP_POINTS and CTempReader, its Add() method must be called in the context of one of them. What you've shown here does not.

Re: CArray problem

Bram van Kampen10-Nov-07 15:37

Bram van Kampen

10-Nov-07 15:37

You don't give line numbers, but the compiler complains that the default constructor CObject::CObject() is private (which it is not, it is protected!)
Something Fishy going on here Check Afx.h in your implementation and see if it is private there.

Hope this helps Smile | :)

Bram van Kampen

How can i block a packet ?

jomons8-Nov-07 2:52

jomons

8-Nov-07 2:52

I have an instant message packet.how can i block this specific packet to reach to the destination?I can block this by changing the content of packet.
But after that no more messages are send by the messenger(Yahoo).
sorry for my english..
Please someone help me ..very urgent............

Thanks in advance.......

Jomon

Jomon

Re: How can i block a packet ?

Mark Salsbery8-Nov-07 5:21

Mark Salsbery

8-Nov-07 5:21

Without knowing Yahoo's protocol, you can't reliably do this.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: How can i block a packet ?

jomons9-Nov-07 20:35

jomons

9-Nov-07 20:35

Hi Mark,

Thanks for your suggestion. Im working with the packet according to this protocol help.
.http://libyahoo2.sourceforge.net/ymsg-9.txt[^]

I got the packet. But i can't block this.I think yahoo or TCP\IP send an acknowledgement signal before sending each and every packet or one of them calculate the check sum.So it resend the packet.
How can i do this. If you have any idea please tell me ...
Thanks in advance..

Jomon

jump over

youbo8-Nov-07 2:50

youbo

8-Nov-07 2:50

my programme invironment is Visual Studio 2005.when i open the .sln down from the msdn and compile it,it always said jump over.how can i do ? the second question is i can't see anything in the toolbox,but sometimes it appear.what is wrong?

Huh?

jhwurmbach8-Nov-07 3:04

jhwurmbach

8-Nov-07 3:04

youbo wrote:
it always said jump over

What?
Did you translate the error message from chinese?
Sorry, but your translation is incomprehensible.
Maybe you can cite the original message here and a native speaker of chinese can help you?

Re: jump over

toxcct8-Nov-07 3:27

toxcct

8-Nov-07 3:27

youbo wrote:
what is wrong?

maybe you should... "jump over" ?

more seriously, i think you meant to say "convert the solution to a VS2005 solution", right ?

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School Project Deadline

skydivetom8-Nov-07 2:44

skydivetom

8-Nov-07 2:44

Experts,

I'm taking a course in image processing (under Homeland Security). This class was supposed to be an Analysis course; however, the teacher has been focusing heaviliy on C/C++ programming. That's a different story though...

Anyhow, I need to develop a (simple) C/C++ program that does do "something fun" with images (as it relates to Homeland Security).

This project is due in 3 weeks. The instructor isn't very helpful as far as guiding us through the process (e.g. recommendations for "manageable" projects). I have VERY limited C/C++ programming skills and I feel like I'm running out of options.

So, my question:
- where can I find some source code that relates to image processing? Obviusly, I've googled sites, but don't seem to find some existing code that I could either try to enhance or built upon. I tried sites such as Yuv408.com, CodeCogs, CoderProject, etc. Unfortunately, I don't see anything that I use given the "image processing" and "homeland security" constraints.

PLEASE HELP!

Thanks,
skydivetom

Re: School Project Deadline

Maximilien8-Nov-07 3:36

Maximilien

8-Nov-07 3:36

skydivetom wrote:
Anyhow, I need to develop a (simple) C/C++ program that does do "something fun" with images (as it relates to Homeland Security).

You could draw clown noses on detected faces.

Why the heck is "Homeland Security" related to your image processing class ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: School Project Deadline

David Crow8-Nov-07 3:41

David Crow

8-Nov-07 3:41

skydivetom wrote:
Anyhow, I need to develop a (simple) C/C++ program that does do "something fun" with images (as it relates to Homeland Security).

Such as?

Re: School Project Deadline

skydivetom8-Nov-07 5:34

skydivetom

8-Nov-07 5:34

David,

I probably want to implement e.g. "Canny Edge Detection":
http://cs.nyu.edu/~cil217/Vision/vision_edge_detector.htm[^]

Otherwise, I'd like to find the algorithm/code (C/C++) for either "denoising images" or "deblurring images".

Any pointers where I might find some code? It needs to be very basic though... preferably no more than 1 or 2 CPP files.

EEH

Re: School Project Deadline

David Crow8-Nov-07 5:37

David Crow

8-Nov-07 5:37

skydivetom wrote:
Any pointers where I might find some code?

Other than searching for them, I've no clue. Image processing is not something I've ever done.

Re: School Project Deadline

El Corazon8-Nov-07 7:23

El Corazon

8-Nov-07 7:23

skydivetom wrote:
or "deblurring images".

this is not as easy as it sounds depending on what you are trying to do. However, sharpening and smoothing are simple matrix operations. http://www.vbaccelerator.com/codelib/gfx/imgproc.htm[^] (sorry for the vb reference, first one google turned up)

_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

Re: School Project Deadline [modified]

Justin Perez8-Nov-07 4:21

Justin Perez

8-Nov-07 4:21

skydivetom wrote:
Anyhow, I need to develop a (simple) C/C++ program that does do "something fun" with images (as it relates to Homeland Security).

You know those whack-the-mole games in the kids section of an arcade? Well - I suggest you create a whack-the-mole game. Only instead of a mole, use Michael_Chertoff's[^] face. A large mallat as the mouse cursor, and a 3x3 grid should suffice.

-- modified at 10:43 Thursday 8th November, 2007

Note: There is even an image of his face in that Wiki Smile | :)

I get all the news I need from the weather report - Paul Simon (from "The Only Living Boy in New York")

Re: School Project Deadline

led mike8-Nov-07 4:46

led mike

8-Nov-07 4:46

skydivetom wrote:
(under Homeland Security).

What does that mean?

Re: School Project Deadline

bob169728-Nov-07 16:25

bob16972

8-Nov-07 16:25

skydivetom wrote:
Homeland Security

skydivetom wrote:
PLEASE HELP!

Why do I suddenly feel not so safe anymore? Smile | :)

Re: School Project Deadline

David Crow9-Nov-07 4:47

David Crow

9-Nov-07 4:47

Actually, you've probably got nothing to worry about. It's much like the safest place to be when a new driver is on the road is in the middle of the road itself, or the safest place to be when out with a new hunter is in front of the target.

Monitoring Registry modifications

Hayder Yusuf7-Nov-07 23:47

Hayder Yusuf

7-Nov-07 23:47

Hi, how can i build a program to monitor the registery modifications (hooking advapi.dll)

Hayder Yousif

Re: Monitoring Registry modifications

Matthew Faithfull8-Nov-07 1:11

Matthew Faithfull

8-Nov-07 1:11

I don't know but Microsoft's regmon.exe application manages it no problem. As they're no longer allowed to hide private APIs for their own use, at least in Europe, you could try to find out how regmon works. Hooking ADVAPI sounds plausible but my guess is there's a better way.

Nothing is exactly what it seems but everything with seems can be unpicked.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.