Re: array of structure - C / C++ / MFC Discussion Boards

Re: Regarding parameter by reference in copy constructor [modified]

prasad_som12-Dec-06 22:16

12-Dec-06 22:16

For that you need to know, in which cases copy ~~contructor~~ constructor get called.
One of the place where it is called is when we pass parameter by value.
Thats why, to avoid recursive call, prameter to copy constructor is passed by reference.

-- modified at 4:48 Wednesday 13th December, 2006

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Regarding parameter by reference in copy constructor

Rajesh R Subramanian12-Dec-06 22:19

Rajesh R Subramanian

12-Dec-06 22:19

pan_angel wrote:
why we have to pass a reference of same class type into a copy constructor?

Obviously you'd.

Read it here[^]. I suggest you to read a good book on c++ or rather on the object oriented paradigm.

Nobody can give you wiser advice than yourself. - Cicero
ப்ரம்மா

Re: Regarding parameter by reference in copy constructor

Mark Salsbery13-Dec-06 6:23

Mark Salsbery

13-Dec-06 6:23

pan_angel wrote:
I am confused that why we have to pass a reference of same class type into a copy constructor?

Which part are you confused about: the reference has to be the same class or that you have to
pass a reference?

The reference has to be the same class because it is a copy constructor - used to construct a copy
of an object of the class, as it's name implies.

The reference has to be there because it's the only way to access the object which needs to be
copied.

array of structure

namy112-Dec-06 22:02

namy1

12-Dec-06 22:02

Hello everyone,
I am creating an array of structure as
struct Table
{
RFC_CHAR fieldname[35],
fieldvalue[255];
};
Table t2[2];
Now i m initialising this array in a funtion and i want the funtion to return this structure
as well as in another function i want to recieve this array and finally i want a pointer to point to this function
please tell me how can i do this Rose | [Rose]

Re: array of structure

CPallini12-Dec-06 23:00

CPallini

12-Dec-06 23:00

And what is the question?

Maybe you don't know how to pass the array?
Then have a look at the following code snippet:

<br />
void testStruct(Table *tp)<br />
{<br />
	tp[0].fieldname = ...<br />
<br />
}<br />

hope that helps...

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: array of structure

namy112-Dec-06 23:20

namy1

12-Dec-06 23:20

no i dont want to pass the array to a function
i have created array of a structure and initialised it in function A and A returns this array
the struct is declared global
now in function B i want to call funtion A and take its return value which would be the array in an array variable Cry | :((

Re: array of structure

CPallini13-Dec-06 0:36

CPallini

13-Dec-06 0:36

Sorry, I can't figure what do you want to do...
Can you please post the code snipped that is giving you troubles?

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: array of structure

James R. Twine13-Dec-06 2:51

James R. Twine

13-Dec-06 2:51

Table *SomeFuncThatReturnsIt( void )
{
    Table *pTbl = new Table[ 2 ];
 
    if( pTbl )
    {
       // Initialize pTbl[ 0 ]...
       // Initialize pTbl[ 1 ]...
    }
    return( pTbl );
}

   Something like that will allocate the array of structures, initialize them as required, and then return a pointer to the array, or return NULL if allocation fails (if your new works that way). The caller is now responsible for deallocating the memory referenced by the pointer, of course.

   This is not generally how I like to do things, because I avoid hand-off memory whenever possible, but I believe it will get you in a direction of what you want to do.

   Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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Do you know this files structure?

Waldermort12-Dec-06 21:26

Waldermort

12-Dec-06 21:26

I'm developing a set of classes to read the infamous 'index.dat' files. There is very little information about the format of these files available, so far most of my searches have turned up viewer utilities and info on how to delete them, but nothing much on the actual format.

Looking through a hex dump I have managed to identify maybe 30% of the items. If you know or have come across any details about these files, I would really appreciate your help.

Re: Do you know this files structure?

Steve Echols12-Dec-06 21:46

Steve Echols

12-Dec-06 21:46

You've probably looked at this already, but it's all I could find:
http://www.codeproject.com/vbscript/Internet_Explorer_Spy.asp?df=100&forumid=25033&exp=0&select=1017322#xx1017322xx[^]

- S
50 cups of coffee and you know it's on!

Re: Do you know this files structure?

Waldermort12-Dec-06 22:19

Waldermort

12-Dec-06 22:19

I had already looked at it and it's not really what I'm looking for. Those scripts simply parse the .dat files locating the relevent info. Reading these files is relativly simple, but adding and modifying them will require a little more work.

Re: Do you know this files structure?

David Crow13-Dec-06 7:08

David Crow

13-Dec-06 7:08

WalderMort wrote:
I had already looked at it and it's not really what I'm looking for. Those scripts simply parse the .dat files locating the relevent info. Reading these files is relativly simple, but adding and modifying them will require a little more work.

In your initial request was the statement, "I'm developing a set of classes to read the infamous 'index.dat' files." It helps others to help you if you state what you want, what you don't want, and what you already know, when making such requests.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

How to get "general" tab info

LiYS12-Dec-06 21:16

LiYS

12-Dec-06 21:16

Hi all:

How to get "general" tab info from "sys property" pragrammatically, I'm trying to identify Windows XP 64bit OS, but with GetVersionEx I always get "Windows Server 2003" instead of XP. But I saw the info on "General" tab was correct, So...

Re: How to get "general" tab info

Mila02513-Dec-06 1:26

Mila025

13-Dec-06 1:26

Hi,

Check this:
Getting the System Version[^]

-----------
Mila

Re: How to get "general" tab info

David Crow13-Dec-06 7:11

David Crow

13-Dec-06 7:11

How are you using the returned structure?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

List Control in sdi application

neha.agarwal2712-Dec-06 21:12

neha.agarwal27

12-Dec-06 21:12

I m trying to make a list control in sdi application using create function.
Like this...
Create(WS_CHILD|WS_VISIBLE|WS_BORDER|LVS_REPORT,
CRect(300,300,800,600), this, 1);
This is creating my list control in particular area(i.e the co-ordinates specified in CRect)
but i want that it should occupy my whole sdi window how to do it????

Re: List Control in sdi application

Naveen12-Dec-06 21:25

Naveen

12-Dec-06 21:25

why dont u create a sdi application with listview. in the appwizard, u can find option for this in the last page.

nave

Re: List Control in sdi application

David Crow13-Dec-06 7:12

David Crow

13-Dec-06 7:12

Are you using MFC?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

How display messages in unicode?

Atul2312-Dec-06 20:59

Atul23

12-Dec-06 20:59

Hi All

I am doing project in VC++ , in which i want to display messages in japanese. What changes i need to make in code and any other setting.

Regards
M.Atul

M.Atul

Re: How display messages in unicode?

Naveen12-Dec-06 21:23

Naveen

12-Dec-06 21:23

specify _UNICODE in the preprocessor directive.

nave

Re: How display messages in unicode?

ShilpiP12-Dec-06 23:58

ShilpiP

12-Dec-06 23:58

Hi, I am already completing this project ,actually with the help of unicode standard u can do it,i am sending u one site
http://www.unicode.org/charts[^] Smile | :)

Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

TCHAR to string

Programm3r12-Dec-06 20:37

Programm3r

12-Dec-06 20:37

Hi all,

How can i convert a TCHAR to a string?

for example:

<code>
TCHAR  infoBuf[INFO_BUFFER_SIZE];
GetComputerName( infoBuf, &bufCharCount );
string pc;
... convert / assign the value of infoBuf to pc ...
</code>

Many Thanx

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: TCHAR to string

Mila02512-Dec-06 21:00

Mila025

12-Dec-06 21:00

Hi,

There is no needed any conversion:

pc.assign( bufCharCount );

should work fine.

-----------
Mila

Re: TCHAR to string

Programm3r12-Dec-06 21:08

Programm3r

12-Dec-06 21:08

Sure about that ?

Error 1 error C2664: 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::assign(const std::basic_string<_Elem,_Traits,_Ax> &)' : cannot convert parameter 1 from 'DWORD' to 'const std::basic_string<_Elem,_Traits,_Ax> &' c:\documents and settings\qx55246\my documents\visual studio 2005\projects\testsmsintferface\testsmsintferface\testsmsintferface.cpp 24

-- modified at 3:49 Wednesday 13th December, 2006

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: TCHAR to string

Mila02512-Dec-06 21:21

Mila025

12-Dec-06 21:21

sorry my mistake not bufCharCount but infoBuf

pc.assign( infoBuf );

-----------
Mila

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