Re: urgrntly required - C / C++ / MFC Discussion Boards

6Qing889-Jan-09 2:05

9-Jan-09 2:05

hi, everyone.
Other posts appear very quickly, it's harder to find my previous one related to
this question, so I decide to post this one:

Is the following code legal, for example:

typedef struct _VECTOR {
long a;
} _VECTOR, *_PVECTOR;

since I know:

typedef int int;

is illegal, but the 'typedef struct' example mentioned above is legal at least in
mingw2.95.

Is it possible to get an error from some other compilers that there's a
'typedef redefinition'?

Thanks in advance. Smile | :)

Re: Possible violation in typedefs

CPallini9-Jan-09 2:18

CPallini

9-Jan-09 2:18

It is legal.
BTW: have you tried to compile it (with a compiler other that mingw2.95)?
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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Possible violation in typedefs

6Qing889-Jan-09 3:01

6Qing88

9-Jan-09 3:01

I've tried with Dev C++, but I cannot remember its version, and I got
'typedef redefinition' when compiling a C++ unit, so I think it may be
possible in C compilation, although it's passed with VC6.0.
Most of the problems I run accoss owed to VC6.0's language extension,
the project created in that environment successfully got countless errors
and warnings in gcc, there were even some 'syntax errors', so I had to make
the transition to a more stricted one.

Re: Possible violation in typedefs

Stuart Dootson9-Jan-09 2:25

Stuart Dootson

9-Jan-09 2:25

It's legal - a tag name is not a type name. Struct, union and enum tag names share one namespace, while type names all share a different namespace. This means that typenames can be the same as tag names.

That means that your example is legal, but the following isn't, as the three tag names (for the struct, union and enum) are all the same:

typedef struct _VECTOR {} _VECTOR;
union _VECTOR {};
enum _VECTOR {};

Re: Possible violation in typedefs

6Qing889-Jan-09 3:06

6Qing88

9-Jan-09 3:06

yeah, I got the definition,
owe you one.

Re: Possible violation in typedefs

Luc Pattyn9-Jan-09 2:44

Luc Pattyn

9-Jan-09 2:44

Hi,

Your code is valid C code, whether it is legal I can not say.

Normal C compilers will accept it; the odd one that would not, would be wrong.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Love, happiness and fewer bugs for 2009!

urgrntly required

kir_MFC9-Jan-09 2:04

kir_MFC

9-Jan-09 2:04

hi experts i installed a s/w called QD developed in vc++ 1.52.it is installed successfully and running properly.i have compete code for QD s/w.when i building exe from code and run it is not executing properly.
but same exe when i copied in installed path it is executing successfully...what is the reason how to resolve it?

kir_MFC

Re: urgrntly required

CPallini9-Jan-09 2:11

CPallini

9-Jan-09 2:11

kir_MFC wrote:
urgrntly required

'required' is rude.
'urgently required' is even ruder.
'urgrntly requred' is... a typo.

BTW: The executable has some dependecies. It may find them in the installation path.
What do you want 'to resolve' (i.e. It works at should be, in my opinion...)?
Smile | :)

Re: urgrntly required

Jijo.Raj9-Jan-09 4:27

Jijo.Raj

9-Jan-09 4:27

CPallini wrote:
# 'required' is rude.

# 'urgently required' is even ruder.

# 'urgrntly requred' is... a typo.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Need help to get list of files in a directory...

Thilek9-Jan-09 0:50

Thilek

9-Jan-09 0:50

Hi guys,

I been working on a antivirus project as my final year project.. i have some problem with getting the list of all the files in a directory..
Lets say i choose C:/ and i want the list of all the files in the directory. Kindly help me with this ya... its a console program and i using DavC++ compiler...

Regards,

Thilek

Re: Need help to get list of files in a directory...

Hamid_RT9-Jan-09 0:54

Hamid_RT

9-Jan-09 0:54

Thilek wrote:
Need help to get list of files in a directory...

Best answer is FindFirstFile/FindNextFile and other way that its not good using of DlgDirList Function.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Need help to get list of files in a directory...

Jijo.Raj9-Jan-09 0:58

Jijo.Raj

9-Jan-09 0:58

Since you are not using VC++ compiler, i'm sticking to pure windows apis. You could use FindFirstFile() and FindNextFile(). Check out this sample[^].

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 2:16

Thilek

9-Jan-09 2:16

JiJO raj,

thanks ya but its still showing 27

C:\Documents and Settings\Thilek\Desktop\2nd_trial\god\main.cpp cannot convert `const WCHAR*' to `const CHAR*' for argument `1' to `void* FindFirstFileA(const CHAR*, _WIN32_FIND_DATAA*)'

i running it on DevC++ since when i run it in VC++ express 2005 many header files missing in its library....

Any suggestions ???

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 3:15

David Crow

9-Jan-09 3:15

Thilek wrote:
thanks ya but its still showing 27

27 files? 27 compiler errors? Please explain.

Thilek wrote:
C:\Documents and Settings\Thilek\Desktop\2nd_trial\god\main.cpp cannot convert `const WCHAR*' to `const CHAR*' for argument `1' to `void* FindFirstFileA(const CHAR*, _WIN32_FIND_DATAA*)'

This is a Unicode issue. You'll need to use wcout.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 3:25

Thilek

9-Jan-09 3:25

NOW I CAN RUN IT USING VC++ PROFF 2005 NO PROBLEM Smile | :)

..

Below is the code i use :

1.#include <windows.h>
2.#include <stdio.h>
3.#include <iostream>
4.#include <string>
5.#include <sstream>
6.
7.
8.
9.std::string convertWCharArrayToString(const WCHAR * const wcharArray) {
10. std::stringstream ss;
11.
12. int i = 0;
13. char c = (char) wcharArray[i];
14. while(c != '\0') {
15. ss <<c;
16. i++;
17. c = (char) wcharArray[i];
18. }
19.
20. std::string convert = ss.str();
21. return convert;
22.}
23.
24.int main()
25.{
26. WIN32_FIND_DATA findFileData;
27. HANDLE hFind = FindFirstFile((LPCWSTR)"*", &findFileData);
28.
29. if(hFind == INVALID_HANDLE_VALUE) {
30. std::cout <<"No files found." <<std::endl;
31. } else {
32. std::cout <<"Files found." <<std::endl;
33. }
34.
35. int fileNumber = 0;
36. std::cout <<fileNumber <<":" <<convertWCharArrayToString(findFileData.cFileName) <<std::endl;
37. while(FindNextFile(hFind, &findFileData)) {
38. fileNumber++;
39. std::cout <<fileNumber <<":" <<convertWCharArrayToString(findFileData.cFileName) <<std::endl;
40. }
41.
42. FindClose(hFind);
43.
44. char a;
45. std::cin>> a;
46. return 0;
47.}

But when i change HANDLE hFind = FindFirstFile((LPCWSTR)"*", &findFileData); to HANDLE hFind = FindFirstFile((LPCWSTR)"C:\*", &findFileData);

its showing no file found and some funny symbols... but i wanted it to show entire list of files in a directory if i choose C:\ or D:\ and so on..

Can u guys help me plz... Smile | :)

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 3:28

David Crow

9-Jan-09 3:28

Thilek wrote:
But when i change HANDLE hFind = FindFirstFile((LPCWSTR)"*", &findFileData); to HANDLE hFind = FindFirstFile((LPCWSTR)"C:\*", &findFileData);

Use two backslashes within string literals.

Why are you using convertWCharArrayToString()?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 3:44

Thilek

9-Jan-09 3:44

Still the same i tried using HANDLE hFind = FindFirstFile((LPCWSTR)"C:\\*", &findFileData);

i even tried with "C://*" "C://" "C:\\"
still showing no files found and some funny symbols...

if i ever change it from "*" to anything this was happen..

hmmm... i am blur now...

Help me plz...

Thanks...

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 3:47

David Crow

9-Jan-09 3:47

Thilek wrote:
i even tried with "C://*" "C://" "C:\\"

What if you used *.*?

Thilek wrote:
still showing...some funny symbols...

How are you verifying this?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 3:56

Thilek

9-Jan-09 3:56

well it jus show the folder name where is the c++ files are located if i use "." ... its not moving out of the folder....

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 4:06

David Crow

9-Jan-09 4:06

Thilek wrote:
well it jus show the folder name where is the c++ files are located if i use "." ... its not moving out of the folder....

This makes little, if any, sense. Perhaps you are not understanding relative vs. absolute paths. For example, if you specified "*.*", then ".\\*.*" is implied and the files in the current working directory (CWD) will be listed. If you specified "..\\*.*", then the files in the CWD's parent folder will be listed. If you specified "c:\\*.*", then the files in the root folder will be listed.

Consider:

void main( void )
{
    WIN32_FIND_DATA findFileData;
 
    HANDLE hFind = FindFirstFile(_T("*.*"), &findFileData);
    if (hFind != INVALID_HANDLE_VALUE)
    {
        BOOL bFound = true;
        int fileNumber = 0;
     
        while (bFound)
        {
            fileNumber++;
            wcout << fileNumber << _T(":") << findFileData.cFileName << endl;

            bFound = FindNextFile(hFind, &findFileData);
        }
 
        FindClose(hFind);
    } 
}

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 4:14

Thilek

9-Jan-09 4:14

but is there anyway if i type in C:/ or D:/ it will show files in the directory including the files in sub folders ???

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 4:18

David Crow

9-Jan-09 4:18

Thilek wrote:
but is there anyway if i type in C:/ or D:/ it will show files in the directory including the files in sub folders ???

Yes. The easiest solution is via a recursive function call. Examples are plentiful on the Web and here at CP.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 4:25

Thilek

9-Jan-09 4:25

thanks ya.. do u have any links related to that topics Smile | :)

Re: Need help to get list of files in a directory...

David Crow9-Jan-09 4:28

David Crow

9-Jan-09 4:28

Link 1

Link 2

Link 3

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Need help to get list of files in a directory...

Thilek9-Jan-09 4:31

Thilek

9-Jan-09 4:31

Thanks a lot my friend i try it out and update with u the results..
God bless you... Smile | :)

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