Re: asking c programming - C / C++ / MFC Discussion Boards

Arif Liminto30-Mar-07 5:30

30-Mar-07 5:30

hi iam doing a project with my friends, and its about find the posbile path of the linklist

and one of the function is wrong

i got the struct

struct node
{
int v1;
int v2;
int w;
}first;

struct node[] *findposibility(int index) // is this wrong the way i call the node
{
struct node *curr;
struct node *a[5];
curr = first;
int i = 0;

while(curr->next != NULL)
{
if(index = curr->v1)
{
a[i] = cur;
i++;
}
curr == curr->next;
}
return a;
}
thanks

Re: asking c programming

Mark Salsbery30-Mar-07 7:04

Mark Salsbery

30-Mar-07 7:04

Where's the "next" member of node?

There's several problems involving uninitialized variables and your function definition.

What are you trying to do?

Mark

"If you can dodge a wrench, you can dodge a ball."

Re: asking c programming

Arif Liminto30-Mar-07 7:10

Arif Liminto

30-Mar-07 7:10

hi sory i forgot to put the next

and one of the function is wrong

i got the struct

struct node
{
int v1;
int v2;
int w;
struct node *next
}first;

struct node[] *findposibility(int index) // is this wrong the way i call the node
{
struct node *curr;
struct node *a[5];
curr = first;
int i = 0;

while(curr->next != NULL)
{
if(index = curr->v1)
{
a[i] = cur;
i++;
}
curr == curr->next;
}
return a;
}
thanks

Re: asking c programming

Mark Salsbery30-Mar-07 8:11

Mark Salsbery

30-Mar-07 8:11

One way to get your code to compile is like this (changes in red):

struct node
{
   int v1;
   int v2;
   int w;
   struct node *next;
} first;
 
struct <code>node **</code>findposibility(int index) 
{
   struct node *curr = <code>&</code>first;
   <code>static</code> struct node *a[5];
   int i = 0;
 
   while(curr->next != NULL)
   {
      if(index <code>==</code> curr->v1)
      {
         a[i] = curr;
         i++;
      }
      curr <code>=</code> curr->next;
   }
   return a;
}

There's still a couple problems:
1) first is not initialized
2) Is 5 the max number of hits you will ever encounter?

"If you can dodge a wrench, you can dodge a ball."

Re: asking c programming

Arif Liminto30-Mar-07 8:26

Arif Liminto

30-Mar-07 8:26

THANKS ITS HELP ME alot actually first i declare in another function but i want to ask u why i have to put static instead of struct node *a[5]?

Re: asking c programming

Mark Salsbery30-Mar-07 9:06

Mark Salsbery

30-Mar-07 9:06

arifliminto86 wrote:
i want to ask u why i have to put static instead of struct node *a[5]?

That's the only way to "return a;" safely. If "a" is not static then it is a temporary variable
that only exists (its scope) in this case for the life of the function. If you return it, and
it doesn't exist after returning, then that's quite a problem.

"If you can dodge a wrench, you can dodge a ball."

Re: asking c programming

led mike30-Mar-07 9:00

led mike

30-Mar-07 9:00

Mark Salsbery wrote:
There's still a couple problems:

Sure and the Titanic sort of sank. Smile | :)

led mike

Re: asking c programming

Mark Salsbery30-Mar-07 9:02

Mark Salsbery

30-Mar-07 9:02

"If you can dodge a wrench, you can dodge a ball."

Re: asking c programming

ThatsAlok1-Apr-07 21:08

ThatsAlok

1-Apr-07 21:08

led mike wrote:

Sure and the Titanic sort of sank.

he he he!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

MultiColumn ListBox [modified]

deville7530-Mar-07 3:46

deville75

30-Mar-07 3:46

Hi, I'm having a hard time with MultiColumn listbox's. I'm trying to Create a Multi Column ListBox that basically displays continually changing data. So I'd like title buttons for each column, and then in each column the data that appears needs to be updated continuously. How do i do this?

By the way. I'm using VC++ 6.0. I know how to make the ListBox, I just don't know how to create titles for each column. Or atleast how to add/edit data to each column would be helpful.
-- modified at 10:00 Friday 30th March, 2007

------------------------
Impossible is Nothing

Re: MultiColumn ListBox

CPallini30-Mar-07 4:42

CPallini

30-Mar-07 4:42

Use a ListView control [^] (or, if you plan to use MFC, the ListCtrl class [^])
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: MultiColumn ListBox

deville7530-Mar-07 5:57

deville75

30-Mar-07 5:57

Thats what I'm looking for! Thanks a lot man.

------------------------
Impossible is Nothing

You're welcome

CPallini30-Mar-07 7:46

CPallini

30-Mar-07 7:46

You're welcome, man.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: MultiColumn ListBox

ThatsAlok1-Apr-07 21:08

ThatsAlok

1-Apr-07 21:08

good link dude!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

How to get Logged in user name using my own windows service application

anumadhu30-Mar-07 3:34

anumadhu

30-Mar-07 3:34

Hello,

I am developing a windows service in VC++.Net2005 on windows XP.
I want the end product should be portable to all the windows OS(atleast to win98,Me,2K,XP and Vista).

In my windows service (which runs on Local System means as System's service), there is a requirement to access the current login user name. To get that i am using the GetUserName() of win32 API, but with this, i am only getting the Login-name as "SYSTEM" ( probably because of the reason that, my windows service is running in System's area(local system)).

Is it feasible to get the current login name instead of getting the user in which the my windows service is running. If possible.. any clues..

Thank you

Anee

Re: How to get Logged in user name using my own windows service application

Johpoke30-Mar-07 9:54

Johpoke

30-Mar-07 9:54

Now, im not sure, but maybe this might work..
getenv("USERNAME");

(It gets the USERNAME value, which also can be seen by doing set in cmd (where loads of other values are))

/Johannes

Re: How to get Logged in user name using my own windows service application

JudyL_MD30-Mar-07 10:17

JudyL_MD

30-Mar-07 10:17

Be very careful doing this. There are a number of issues that you must address. What if the user hasn't signed on yet? What if you have two users logged on at the same time and they are going back and forth using Fast User Switching? What if the user logs off?

Judy

Re: How to get Logged in user name using my own windows service application [modified]

anumadhu2-Apr-07 0:30

anumadhu

2-Apr-07 0:30

Hello friends...

Thanks for your comments. I am taking help from the following article provided with Codeproject:

http://www.codeproject.com/vb/net/Windows_Service.asp

What i understand from this is, we can have access to the WMI. This WMI shows all the information regarding the various processes running in machine. As i want to get the username in which i am currently logged-in, So, i am using the Win32_Process (which gives the name of process explorer... and the substring of, name of process explorer contains the currently logged-in username(eg.. user_nameprocess.exe) . Using string operations... i am trying to extract that particular username part of the process explorer name.

Now,Taking help of this, i have added System.Management reference to my project (VC++.NET/windows XP) and then i got two files namely ROOT.CIMV2.Win32_Process.h/cpp with my project name. And in the ROOT.CIMV2.Win32_Process.cpp contains following lines of code:

#include Stdafx.h
#include ROOT.CIMV2.Win32_Process.h

After this i added System refrence through the project properties.

But while building this project, i am getting some errors in these new files ROOT.CIMV2.Win32_Process.h/cpp.

and command line options are:

C/C++ Command line options:
/Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /FD /EHa /MDd /Yu"stdafx.h" /Fp"Debug\myservice.pch" /Fo"Debug\\" /Fd"Debug\vc80.pdb" /W0 /nologo /c /Zi /clr:pure /TP /errorReport:prompt /FU "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Management.dll" /FU "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.dll"

Linker Command Line Options:
/OUT:"D:\Apr\2\myservice\Debug\myservice.exe" /INCREMENTAL /NOLOGO /MANIFEST /MANIFESTFILE:"Debug\myservice.exe.intermediate.manifest" /DEBUG /ASSEMBLYDEBUG /PDB:"d:\Apr\2\myservice\debug\myservice.pdb" /SUBSYSTEM:CONSOLE /MACHINE:X86 /FIXED:No /ERRORREPORT:PROMPT setupapi.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib

And stdafx.h file looks like this:

#pragma once

#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers

// TODO: reference additional headers your program requires here

#define _AFXDLL
/*I included this, bcoz if i don't, then i m getting an build error: D:\Microsoft Visual Studio 8\VC\atlmfc\include\afx.h(24) : fatal error C1189: #error : Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version. Please #define _AFXDLL or do not use /MD[d]
*/

#pragma warning (disable:4430)
#include "ROOT.CIMV2.Win32_Process.h"
#include "afxdb.h"
#include <initguid.h>
#include <setupapi.h>
#include <dbt.h>
#include "cfgmgr32.h"

And if i put the #include _AFXDLL, then i am getting the following errors:

WINVER not defined. Defaulting to 0x0502 (Windows Server 2003)
D:\Microsoft Visual Studio 8\VC\atlmfc\include\afxv_w32.h(242) : error C3641: 'DrawState' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\afxv_w32.h(260) : error C3641: 'DrawStatusText' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\PlatformSDK\include\winbase.h(1849) : error C3641: 'FreeResource' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\afxv_w32.h(274) : error C3641: 'UnlockResource' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(90) : error C3641: 'InterlockedExchangePointer' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(104) : error C3641: 'ATL::_AtlGetThreadACPFake' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(130) : error C3641: 'ATL::_AtlGetThreadACPReal' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(137) : error C3641: 'ATL::_AtlGetThreadACPThunk' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(147) : error C2440: '=' : cannot convert from 'UINT (__clrcall *)(void) throw()' to 'ATL::ATLGETTHREADACP'
Address of a function yields __clrcall calling convention in /clr:pure and /clr:safe; consider using __clrcall in target type
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(151) : error C2440: '=' : cannot convert from 'UINT (__clrcall *)(void) throw()' to 'ATL::ATLGETTHREADACP'
Address of a function yields __clrcall calling convention in /clr:pure and /clr:safe; consider using __clrcall in target type
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(158) : error C3641: 'ATL::_AtlGetConversionACP' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(594) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(613) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(631) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(636) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atlconv.h(589) : error C3641: 'AtlDevModeW2A' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atltrace.h(64) : error C2440: 'default argument' : cannot convert from 'int (__cdecl *)(int,const char *,int,const char *,const char *,...)' to 'ATL::CTrace::fnCrtDbgReport_t'
Address of a function yields __clrcall calling convention in /clr:pure and /clr:safe; consider using __clrcall in target type
D:\Microsoft Visual Studio 8\VC\atlmfc\include\atltrace.h(143) : fatal error C1903: unable to recover from previous error(s); stopping compilation

NOTE: I have not used windows service Template (provided with VC++.Net 2005). I have just used the windows.h advapi32.dll.

Any kind of help or clue is greatly thankful...

Thanks

-- modified at 6:49 Monday 2nd April, 2007

Anee

Re: How to get Logged in user name using my own windows service application

ThatsAlok1-Apr-07 21:07

ThatsAlok

1-Apr-07 21:07

the hkey_local_machine is available from registry.. you can HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon for current logged on user + plus you need to write Winlogon Notification Package for same!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
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Windows XP theme

Farhat Aisha30-Mar-07 3:16

Farhat Aisha

30-Mar-07 3:16

Hi
I am using the following function to use the xp themes in my property page
EnableThemeDialogTexture(m_hWnd,ETDT_ENABLETAB);

The dialog looks fine when its size is small but as I increase the length of the dialog the "gradient fill" of the background seems to be tiled? Is there any way of getting rid of tiling and have a smooth gradient fill background, without drawing it all by my self?

Re: Windows XP theme

Mark Salsbery30-Mar-07 8:17

Mark Salsbery

30-Mar-07 8:17

Only the newly-exposed portion of the background gets repainted during the resize.
You may need to foce the entire background to be redrawn in response to WM_SIZE.

Mark

"If you can dodge a wrench, you can dodge a ball."

Re: Windows XP theme

Michael Dunn30-Mar-07 19:23

Michael Dunn

30-Mar-07 19:23

I seem to recall that this is a problem/limitation/bug/whatever with the texture. It's a fixed size, so if your window is bigger than that size, the texture has to be tiled.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Windows XP theme

Farhat Aisha4-Apr-07 4:12

Farhat Aisha

4-Apr-07 4:12

About Multicast. Help

kcynic30-Mar-07 2:35

kcynic

30-Mar-07 2:35

I'm developing a program,which makes more than one person chat in the one holl. I want to using multicast.but i find that it seems that most of the routine do not surpport multicast, although i only want to send one paceage to others,I must send it for each one!
Somebody how should I do would be more effient?Thanks

Re: About Multicast. Help

Mark Salsbery30-Mar-07 7:07

Mark Salsbery

30-Mar-07 7:07

kcynic wrote:
i find that it seems that most of the routine do not surpport multicast

What routines?

Are you using sockets?

Mark

"If you can dodge a wrench, you can dodge a ball."

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