C / C++ / MFC

Naveen7-Sep-07 0:40

Naveen

7-Sep-07 0:40

Whats the problem in renaming all the c files to cpp?

nave

[OpenedFileFinder]

jhwurmbach7-Sep-07 1:39

7-Sep-07 1:39

.C and .CPP files are treated differently by the compiler. (Or so I think).

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

jhwurmbach7-Sep-07 1:42

7-Sep-07 1:42

prakashd wrote:
fatal error C1853: 'Debug/.pch' is not a precompiled header file created with this compiler Error executing cl.exe.

I am inserting a ".c" file into my project which also needs to include "stdafx.h"

No! Dont do that!

Instead, switch your C-files individually to "Not using precompiled headers".

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

prakashd12-Sep-07 3:04

prakashd

12-Sep-07 3:04

Hi jhwurmbach,

Thanks, It's working yar... I have created the standard library. Now i have to implement in the console application. I have import standard library in to console application. Finally i got two error. Can u please give me some solution's.

main.obj : error LNK2001: unresolved external symbol "public: int __thiscall IperfMain::executeIperf(int,char * * const)" (?executeIperf@IperfMain@@QAEHHQAPAD@Z)
Debug/PorduceEXE2.exe : fatal error LNK1120: 1 unresolved externals

This are all the two errors i got.

Advance thanks.

Arul prakash

jhwurmbach12-Sep-07 3:26

12-Sep-07 3:26

It seem as if the lib containing IperfMain::executeIperf does not get linked.
Check your linker settings.

Maybe you need to follow Karls advice and add "extern C" to the header/around the header inclusion.

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

prakashd17-Sep-07 4:56

prakashd

17-Sep-07 4:56

Hi jhwurmbach,
It's working fine. But i got link error called
error LNK2001: unresolved external symbol _getaddrinfo@16
Debug/pro.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

Note: I have included
#include"ws2tcpip.h"
and I have linked Ws2_32.lib.

please note i'm using MSVC 6.
please tell how to use getaddrinfo()
in VS 6. Thanks Mr.jhwurmbach

Arul prakash

Where do I write questions in C?

KaЯl7-Sep-07 2:10

KaЯl

7-Sep-07 2:10

When mixing C and C++, also don't forget to use the extern "C" directive for your C declarations so the linker will be able to do its job. More info there: http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html[^]

RWC2007: Jour J!

Fold with us! ¤ flickr

IStream and XmlLite

Jan S.6-Sep-07 23:10

Jan S.

6-Sep-07 23:10

* The xmlparser XmlLite from microsoft uses IStream to read and write xml.
It is described how to copy text into a stream, but not how to read the text back from the stream. Do you know how to do this?

Code to write text to IStream.
IStream * pStream = NULL;
HGLOBAL hXmlContent;
HRESULT hr;
int iResult = 0;

// allocate global memory to copy the HTML content to
hXmlContent = ::GlobalAlloc( GPTR, ( ::_tcslen( kpszXML_in ) + 1 ) * sizeof(TCHAR) );
if (!hXmlContent)
return false;

::_tcscpy( (TCHAR *) hXmlContent, kpszXML_in );

// create a stream object based on the HTML content
hr = ::CreateStreamOnHGlobal( hXmlContent, TRUE, &pStream );

Re: IStream and XmlLite

George L. Jackson7-Sep-07 3:10

George L. Jackson

7-Sep-07 3:10

I have been using this: http://msdn2.microsoft.com/en-us/library/ms752876.aspx[^].

"We make a living by what we get, we make a life by what we give." --Winston Churchill

Re: IStream and XmlLite

Jan S.7-Sep-07 3:51

Jan S.

7-Sep-07 3:51

Thank you for the link.

I also found another way to do this.

// Reset the seek pointer<br />
LARGE_INTEGER pos;<br />
pos.QuadPart = 0;<br />
pOutStream->Seek((LARGE_INTEGER)pos, STREAM_SEEK_SET, NULL);<br />
<br />
// Buffer to fill from IStream<br />
char pszXml[4095]; // char - Encoding dependent???<br />
ULONG cb=4095;<br />
ULONG cbRead=0;<br />
CString strXmlFromIStream;<br />
// Read the text from the stream on chunk at a time<br />
do <br />
{<br />
    memset(pszXml,0,4095);<br />
    hr = pOutStream->Read(pszXml, cb, &cbRead);<br />
    strXmlFromIStream += pszXml;<br />
} while(cbRead!=0);

OLE Viewer

George_George6-Sep-07 22:40

George_George

6-Sep-07 22:40

Hello everyone,

I am looking for some tutorials about how to use OLE Viewer. But I can not find any detailed tutorials. Any reference?

thanks in advance,
George

gizmokaka6-Sep-07 22:29

6-Sep-07 22:29

In which forum should I submit C questions???????

Maxwell Chen6-Sep-07 22:31

Maxwell Chen

6-Sep-07 22:31

Just ask here!

Maxwell Chen

Nishad S6-Sep-07 22:33

Nishad S

6-Sep-07 22:33

This is the forum... Smile | :)

- NS -

Hamid_RT6-Sep-07 23:43

Hamid_RT

6-Sep-07 23:43

If you like to ask on the codeproject this forum is good choice.;)

gizmokaka6-Sep-07 23:49

6-Sep-07 23:49

Thanks and sorry for the late reply,

my ques is like that:

i have a struct built for ADT in a source file, and it compiles successfully.
the problem is that when i try to use it in the designated program, It doesn't recognize all of the members of the struct.

here is the relevant code:

this is the struct source file:

typedef struct data
{
	char** colName;
	const struct element_interface** ifc;
	Element* temp_row;
}data;

typedef struct table_rec
{
	char TabInitFlag;

	int iterator;
	data* localData;
	char** last_found_array;
	Matrix tableArray;
	int tableWidth;
	int last_found;
}table_rec;

header file:

typedef struct table_rec *Table;

application try to use:

Result rdb_del_customer(RestaurantDB rdb,const char* name)
{
		Element passName[1]; 
		int *count;
		passName[0] = string_to_element(name);
		count = (int*)malloc(sizeof(int));
		tab_delete_rows(rdb->customers , rdb->customers->localData->colName , passName , 1 , count);
		if(*count == 0)
			return RES_NO_MATCH;
		else
			return RES_NO_ERROR;
}

it doesn't recognize the rdb->customer as a Table, pointer to table_rec Struct

Error message:

error C2037: left of 'localData' specifies undefined struct/union 'table_rec'	c:\documents and settings\dan\my documents\visual studio 2005\projects\mtm_rst\mtm_rst\restaurantdb.c	61

and of course I want to use code project to ask my questions, it's my guide in
every step on my way to become a programmer excellent.

Cedric Moonen6-Sep-07 23:53

Cedric Moonen

6-Sep-07 23:53

Put your structure in the header file instead of the source file.

Cédric Moonen
Software developer

Charting control [v1.2]

gizmokaka7-Sep-07 0:05

7-Sep-07 0:05

I am not allowed to do this, this is what ADT programming is all about.

I must hide my implementation from the user(in this case me Smile | :)

),

so I only pass to the user the header interface to my ADT, and the object file,

he uses that to create he's own program using my module.

it's a school assignment :-> Smile | :)

Cedric Moonen7-Sep-07 0:56

Cedric Moonen

7-Sep-07 0:56

gizmokaka wrote:
I must hide my implementation from the user(in this case me ),

Which implementation ? I just see a structure with data in it, no functions at all. How can somebody manipulate an 'object' without knowing what's inside.
How could you know that the structure contains a localData member if it is hidden ?

Hide implementation means that you put your function definitions in a cpp file and only 'show' (through a header file) the function prototypes.

Cédric Moonen
Software developer

Charting control [v1.2]

gizmokaka7-Sep-07 0:58

7-Sep-07 0:58

true, and that's what I do,
only I am not allowed to reveal the members of the struct because
then the user of the ADT can change their type or value directly
which can hurt the functionality and integrity of the ADT.

Russell^'7-Sep-07 0:56

Russell^'

7-Sep-07 0:56

The error message tells clearly what is the error:

gizmokaka wrote:
rdb->customers->localData->colName

at this line the structs are unknown.

You have to include the struct declarations before, so, as is telling Cedric, you canto put they in the header file.

Or, if you want to hide that structs to the user, you have to put ALL the code that use they in the SAME file, above the declaration of that structs.
Elseway the compiler can't know that table_rec and data exists.

Dead | X|

Russell

gizmokaka7-Sep-07 1:09

7-Sep-07 1:09

Maybe I am missing something here but

the ADT is a module of it's own, and is separated from the application using it.

I can't put the struct in the user application, only the header and link to the

ADT object file.

and yes I do want to hide the structs to the user.

Again, how do you suggest I do that???

I think I didn't understand the last time
Sniff | :^)

jhwurmbach7-Sep-07 1:50