C / C++ / MFC Discussion Boards

neo2922-Jan-13 0:31

22-Jan-13 0:31

Pardon me!! I am new here. I am unable to use addNode function. When i declare Node* it doesnt compile.
I am trying to implement a linked list in c++ without
using structures and only use pure classes.I am rusty here. Any help would be great.
head->addNode() and head.addNode() doesnt work.

C++

#include<iostream>
#include<cstdlib>
using namespace std;
class Node
{
  int   data;
  Node* next;
public:
  Node()
 {
   data=0;
   next=NULL;
 }
 void addNode(int a)
{
   if(this!=NULL)
   {
     data=a;
     next=NULL;
   }
}
};
void main()
{
  Node* head;
        head.addNode(10);
}

Re: c++ implementation of a linked list.

Maximilien22-Jan-13 1:35

Maximilien

22-Jan-13 1:35

addNode is not a member of the Node class.

C++

class Node 
{
 public:
   void addNode(int a);
};
void Node::addNode( int a )
{
//...
}

your addNode is not good, you need to think things over; you do not allocate a new node; you do not assign the next pointer ...

I find that using free functions instead of class methods makes things easier when doing this; a node only contains the data (and the next pointer).

if all fails, use std::vector.

Good luck.

Nihil obstat

Re: c++ implementation of a linked list.

Sivaraman Dhamodharan22-Jan-13 2:42

Sivaraman Dhamodharan

22-Jan-13 2:42

C++

void main()
{
  Node* head;
        head.addNode(10);
}

Create the object in the heap first. You just declared a variable stating "I will hold address of Node object in a variable head". But, where does that object? When there is no object head-> will not work. Head.addNode() also wont work as the object is not in stack.

Correction:

C++

void main()
{
  Node* head = new Node();
        head->addNode(10);
}

Object will be created in heap.

or

C++

void main()
{
  Node head;
  head.addNode(10);
}

Object will allocated on stack

Programming Article

Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute21-Jan-13 23:52

Bee cute

21-Jan-13 23:52

I try to change CScrollBar's interface (MySkinScrollbar is delivered MFC's CScrollBar).
I loaded image to draw over the windows's classic interface -> It's done.

But when I click on "UpArrow" button in ScrollBar. The windows's classic interface is drawn over my image.
I think I should catch WM_LBUTTONDOWN and WM_LBUTTONUP message to redraw (calling Invalidate()).
I'm success in catching WM_LBUTTONDOWN message.
But I can't catch WM_LBUTTONUP message.

Please help me to solve this problem!

You can search with key word "//Why don't show message ?????". Jump to my problem.
This is my project (use VS 2003):
Download Project

By the way, please tell me the way to reset default the Visual Studio 2003 (like has just installed)!

Thanks for all !!!!!

(I'm Vietnamese. So my English is not good. If I make some mistakes, please help me out.)

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan21-Jan-13 23:57

Richard MacCutchan

21-Jan-13 23:57

You may want to look into the Custom draw[^] or Subclassing Controls[^] features of Windows controls.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute22-Jan-13 14:36

Bee cute

22-Jan-13 14:36

Richard MacCutchan wrote:
You may want to look into the Custom draw[^] or Subclassing Controls[^] features of Windows controls.

Would you show me the detail?
I use MFC to "remix" control. I don't use WINAPI.

Please help me!

My deadline is no longer !!!!! Frown | :(

Thanks for all !

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

_Flaviu22-Jan-13 20:55

_Flaviu

22-Jan-13 20:55

Weird, I have tested myself your application, and another one from [here], and WM_LBUTTONUP mapped does not function ... why do you need this handler ? Maybe you can slove your task in another way ...

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 15:57

Bee cute

23-Jan-13 15:57

Flaviu2 wrote:
why do you need this handler ? Maybe you can slove your task in another way ...

First, I thank you for replying !
I need WM_LBUTTONUP to solve my problem: When I click on "Up/Left Arrow Button" or "Down Arrow Button", my scroll bar's interface become a window classic interface.
I have a mini clip to explain my problem.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

_Flaviu23-Jan-13 20:32

_Flaviu

23-Jan-13 20:32

I don't know if it's suitable for you, but why don't change the scrollbar style on left button down ? Smile | :)

It's just an ideea ...

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 23:13

Bee cute

23-Jan-13 23:13

Flaviu2 wrote:
I don't know if it's suitable for you, but why don't change the scrollbar style on left button down ? It's just an ideea ...

Thanks for your great idea!

I solved this problem, other problem is appeared.
Could you tell how to "redraw the thumb" in my skin scroll bar (with ListBox) ?
I don't have a algorithm to solve Cry | :((

This is a mini clip to explain my trouble ! (The thumb isn't moved ????? )

Please help me!

Thanks for all!

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan22-Jan-13 21:50

Richard MacCutchan

22-Jan-13 21:50

Bee cute wrote:
Would you show me the detail?

What detail? I have given you links to the two features you need to investigate for Win32 controls. You can follow up by checking the documentation for the MFC classes.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 16:00

Bee cute

23-Jan-13 16:00

Richard MacCutchan wrote:
What detail? I have given you links to the two features you need to investigate for Win32 controls. You can follow up by checking the documentation for the MFC classes.

I have visited your link but I understood a little. I am bad at Win32 (WinAPI). I only know MFC.

Thanks so much for your help! Smile | :)

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan23-Jan-13 22:49

Richard MacCutchan

23-Jan-13 22:49

Bee cute wrote:
I only know MFC

You can still inherit from MFC classes and change their behaviour.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 23:16

Bee cute

23-Jan-13 23:16

Richard MacCutchan wrote:
You can still inherit from MFC classes and change their behaviour.

Thank you for your enthusiasm so much !

I solved this problem and I have other problem.
Could you tell how to "redraw the thumb" in my skin scroll bar (with ListBox) ?
I don't have a algorithm to solve Cry | :((

This is a mini clip to explain my trouble ! (The thumb isn't moved ????? )

Please help me!

Thanks for all!

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan23-Jan-13 23:43

Richard MacCutchan

23-Jan-13 23:43

Sorry, this is not something I have tried, and I do not have MFC.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

_Flaviu24-Jan-13 21:01

_Flaviu

24-Jan-13 21:01

Hve you solve the problem ? Now you can catch OnLButtonUp on your CMyScrollBar class ?

How to Restart My Mfc Application

haha_c21-Jan-13 20:51

haha_c

21-Jan-13 20:51

Hi ,I want to Restart My Mfc Program In some place,But I dont,t know how to do it.
Thanks

Re: How to Restart My Mfc Application

CPallini21-Jan-13 22:07

CPallini

21-Jan-13 22:07

What do you mean exactly?
Do you need your application to restart itself?

Veni, vidi, vici.

Re: How to Restart My Mfc Application

chaau22-Jan-13 16:47

chaau

22-Jan-13 16:47

I think Restart Manager[^] is your answer. If you are building it with the latest MFC (the one with a feature pack), then it is built into the MFC Application Wizard[^]

Re: How to Restart My Mfc Application

Marius Bancila22-Jan-13 21:03

Marius Bancila

22-Jan-13 21:03

Here is how to add restart support for you MFC apps: How to: Add Restart Manager Support[^] and MFC Restart Manager Support in VS2010[^].

(Wininet)How To Send Post Data In Content-Type: multipart/form-data; boundary=---------------------------1f0727f42ab069

81569011221-Jan-13 13:17

815690112

21-Jan-13 13:17

I want send a form to web server,but server receive http status 405.Capture http picket like this:

Content-Type: multipart/form-data; boundary=---------------------------1f0727f42ab069

Content-Length: 3182
Connection: Keep-Alive
Pragma: no-cache
Cookie: ...

-----------------------------7dd2f42cb9030e
Content-Disposition: form-data; name="param1"

0
-----------------------------7dd2f42cb9030e
Content-Disposition: form-data; name="Title"

My Title 1500
-----------------------------7dd2f42cb9030e
Content-Disposition: form-data; name="pinzhong"

511355
-----------------------------7dd2f42cb9030e
Content-Disposition: form-data; name="Min1"

1500
-----------------------------7dd2f42cb9030e
Content-Disposition: form-data; name="xingbie"

1

Wait online.

Re: (Wininet)How To Send Post Data In Content-Type: multipart/form-data; boundary=---------------------------1f0727f42ab069

pasztorpisti21-Jan-13 13:36

pasztorpisti

21-Jan-13 13:36

405 means "Method Not Allowed". You get such a response for example when you send a http request with "POST" method but "POST" is not allowed. I used "POST" just as an example, it could be any of the other methods, even a custom one. The data you pasted to your message is a mime encoded stuff.

If you use pure HTTP and not HTTPS then install WireShark on your machine and capture the full http conversation and post it up here to get more accurate answers. (Use the output of the "Follow TCP Stream" feature of wireshark: you can reach "Follow TCP Stream" when you right click on a TCP capture entry in the list.)

Wait for a WMI method to return

Varun Pandey21-Jan-13 0:27

Varun Pandey

21-Jan-13 0:27

Hey Guys,

Quick question...
I am using WMI method win32_product::install to install a software(VC++). But it doesn't wait for the installation to complete.

Is there any way to execute this method and wait till it is over? Thanks in advance...

-- Varun

How to clean registry of MFC

haha_c20-Jan-13 22:26

haha_c

20-Jan-13 22:26

Hi ,In program somethings of MFC wrote In registry,like Toolbar ,menu,and so on,I want to clean Mfc Toolbar info from the registry,in order to switch version and load different toolbar in different version,How to do it,I use SetRegistryKey(TEXT("Myprogram")),HOw to do it,how to clean the toolbar.

Thanks

Re: How to clean registry of MFC

Richard MacCutchan20-Jan-13 23:05

Richard MacCutchan

20-Jan-13 23:05

See the documentation[^].

Last Visit: 31-Dec-99 18:00 Last Update: 28-May-24 10:44

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