C / C++ / MFC

3-Jun-02 6:20

OK, I'm tearing my hair out over this one...

I've got a project with 2 .cpp files, both of which #include a .h file. All is well in the world. I add a second .h file (4dlist.h), for a template class. All is still well in the world. I then add a new .cpp file, with the single line #include "4DList.h", and now I start getting wierd compile errors.

So to recap, I have the following files:

CenFilter.cpp
CenWriter.cpp
foo.cpp
CenFilter.h
4DList.h

when foo is empty, everything works. when #includes 4DList.h I get errors.

here is the start of 4dlist.h:

template <class TYPE> class C4DList  
{
public:
	C4DList( UINT MaxSize = 1000 );
	virtual ~C4DList();
	C4DList( const C4DList &Copy );
	void operator=( const C4DList &op2 );

	UINT GetSize(){return m_ListSize;}

	void AddTail( TYPE *pData );
	TYPE *GetAt( UINT index );
	void RemoveAt( UINT index );
	void RemoveCurrentIt();//remove at the previous iterator value;
	void RemoveAll();
	void DeleteAllData();

	void ItStart();
	TYPE *ItNext();
...
...
...

So CenFilter.h has #include 4dlist.h and is fine.

but if foo.cpp has the single line it throws up:

Compiling...
foo.cpp
C:\Pete\Capture\CenFilter\CenReadFilter\4dlist.h(12) : error C2629: unexpected 'class C4DList<type> ('
C:\Pete\Capture\CenFilter\CenReadFilter\4dlist.h(51) : see reference to class template instantiation 'C4DList<type>' being compiled
C:\Pete\Capture\CenFilter\CenReadFilter\4dlist.h(12) : error C2238: unexpected token(s) preceding ';'
C:\Pete\Capture\CenFilter\CenReadFilter\4dlist.h(51) : see reference to class template instantiation 'C4DList<type>' being compiled
C:\Pete\Capture\CenFilter\CenReadFilter\4dlist.h(17) : error C2146: syntax error : missing ';' before identifier 'GetSize'
...
...

Now I REALLY don't get this. Oh, BTW, this isn't a standard appwizard project, it's adapted from an MSDN sample project.

I hope someone can help!

Pete

moredip3-Jun-02 6:29

3-Jun-02 6:29

oops, I forgot about the <> thing Blush | :O

the first line of that code snippet should've been

template < class TYPE > class C4DList

sorry!

Joaquín M López Muñoz3-Jun-02 6:29

3-Jun-02 6:29

Not sure if this is your problem, but you have to include <windows.h> for UINT and other such types to be defined.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

moredip3-Jun-02 6:34

3-Jun-02 6:34

I don't think that's it, coz my other .cpp and .h files have UINT's in them

Thanks anyway

Joaquín M López Muñoz3-Jun-02 6:35

3-Jun-02 6:35

Give it a try, it's safer than guessing.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

moredip3-Jun-02 6:44

3-Jun-02 6:44

OK, I think that was the best advice I've had in a few months Smile | :)

Next time I won't make any dumb assumptions. Or rather, I'll try not too.

I guess that the other .cpp files were including something else which eventually included windows.h

Thanks a lot Joaquin, I was starting to lose hope back there Big Grin | :-D

Pete

Joaquín M López Muñoz3-Jun-02 6:47

String Manipulation Problem

3-Jun-02 6:47

I'd say 90% of debugging nightmares stem from false assumptions like "it can't be that because I know it works" and things like that. Happy programming Smile | :)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Handle to the window

Mazdak3-Jun-02 5:36

Mazdak

3-Jun-02 5:36

I want when I run my program ,I get the handle of window opened behind it,I use this code but it does not work,Can anybody tell me whats the problem with this:

hwnd = ::GetForegroundWindow();
hwnd = ::GetNextWindow( hwnd , GW_HWNDNEXT );
::SetForegroundWindow(hwnd);

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Sidney3-Jun-02 5:28

Sidney

3-Jun-02 5:28

Hi everyone,

I know this will not be a tough one for you guys... I'm doing a Win32 Application I was trying to extract a string on a string but String.H is limitted I need more advance parsing like MID Function, I cant use CString.H since my project is notMFC, is there another way around that I can extract a string from a string by specifying the offsets and the length? I tried to use this code:

lpAlpha1 = DynamicData; //Just showing to you that I search a dynamic string....

StartPos = 0;
EndPos = 0;
strLen = strlen(lpAlpha1);
while (StartPos < strLen){
EndPos = strcspn(lpAlpha1," "); //Problem
for(i=StartPos,j=0;i<=EndPos;i++,i,j++){
searchStr[j] = lpAlpha1[i];
}
searchStr[j]='\0';
....Search the searchstring in the database..
StartPos = EndPos;
}
cout << searchStr;

But this code post a problem on the strcspn function since I can's specify which offset should it start looking for the space to get the next word on the string.

I hope you understand my explanation, Please help me on this one.

Thanks/Regards
Sidney

Thanks/Regards
Sidney

Joaquín M López Muñoz3-Jun-02 6:33

3-Jun-02 6:33

If you decide to switch to std::strings (which I highly recommend), then substr works like a charm for extracting substrings much like MID$ in BASIC does.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Sidney3-Jun-02 7:30

Sidney

3-Jun-02 7:30

Hi Joaquin,

ummm... I can't quite understand the use of this, do you have a very sample code that can shoe on how to use this? Please if you have kindy send me a copy, I do not know how to use this.

Thanks/Regards
Sidney

Joaquín M López Muñoz3-Jun-02 7:57

3-Jun-02 7:57

Sure:

std::string str1="Hello miserable world";
std::str2=str1.substr(6,9); // =="miserable"

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Bill Wilson3-Jun-02 6:33

Bill Wilson

3-Jun-02 6:33

string::SubStr does the same thing as CString::Mid

Consult MSDN for more info.

Alexandru Savescu3-Jun-02 9:15

Alexandru Savescu

3-Jun-02 9:15

You can use that CRT strstr function (you can a pointer to the string tu substact and then you do a strncpy to copy into another string the string found. Anyway I would recommand std::string better.

Best regards,
Alexandru Savescu