Re: strtok - C / C++ / MFC Discussion Boards

How to import structure variables from another cpp file

raju_shiva3-Jul-10 1:35

3-Jul-10 1:35

Hi sir,
I have one abc.cpp file,where i have declared some struct variables.

struct abc{
...
....
}abc

If i want to access in another say bcd.cpp file

Any idea
what i have to do

Thanks
Raj

Re: How to import structure variables from another cpp file

CPallini3-Jul-10 2:13

CPallini

3-Jul-10 2:13

Move the structure declaration in a header file, say abc.h:

// abc.h
struct ABC
{
 ...
 ...
};
//...

define the variable in the abc.cpp file, as usual

// abc.cpp
ABC abc;
//...

declare the variable as extern in the bcd.cpp file

// bcd.cpp
extern ABC abc;
//...

enjoy.

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: How to import structure variables from another cpp file

Code-o-mat3-Jul-10 2:26

Code-o-mat

3-Jul-10 2:26

If i understand you correctly then you should move the declarations into a header file and then include this wherever you want your abc struct to be known.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> "It doesn't work, fix it" does not qualify as a bug report. <
> Amazing what new features none of the programmers working on the project ever heard of you can learn about when reading what the marketing guys wrote about it. <

IDispEventSimpleImpl

shakumar_213-Jul-10 1:32

shakumar_21

3-Jul-10 1:32

Hi,
I try to include

#include "stdafx.h"
class CSofphoneView : public CFormView ,
public IDispEventSimpleImpl<1, CSofphoneView,&DIID__IUccEndpointEvents>
in App & View class its working
when I create new c++ class “CCallcontrol” without base class and include

#include "stdafx.h"
class CCallcontrol :
public IDispEventSimpleImpl<1, CCallcontrol, &DIID__IUccEndpointEvents>

but its gets below error. Give me the suggestion .

c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\atlcom.h(4211) : error C2039: '_GetSinkMap' : is not a member of 'CCallcontrol'
1> d:\shanthakumar\sofphone\sofphone\callcontrol.h(9) : see declaration of 'CCallcontrol'
1> c:\program files\microsoft visual studio 9.0\vc\atlmfc\include\atlcom.h(4210) : while compiling class template member function 'HRESULT ATL::IDispEventSimpleImpl::Invoke(DISPID,const IID &,LCID,WORD,DISPPARAMS *,VARIANT *,EXCEPINFO *,UINT *)'
1> with
1> [
1> nID=1,
1> T=CCallcontrol,
1> pdiid=& DIID__IUccEndpointEvents
1> ]
1> d:\shanthakumar\sofphone\sofphone\callcontrol.h(11) : see reference to class template instantiation 'ATL::IDispEventSimpleImpl' being compiled
1> with
1> [
1> nID=1,
1> T=CCallcontrol,
1> pdiid=& DIID__IUccEndpointEvents
1> ]

in “stdafx.h” included
#include // MFC socket extensions
#include // MFC declaration for CTreeView
#include // ATL Base
#include // ATL COM
#include // for CAtlMap
#include
Thanks&Regards
shakumar

strtok

T.RATHA KRISHNAN2-Jul-10 18:45

T.RATHA KRISHNAN

2-Jul-10 18:45

Hi!
I've to tokenize a string. My string is a std::string. strtok() function expects a char*. If I use
c_str() to convert a std::string to char*, I get an error.

std::string player_data;
player_data = strtok(player_data.c_str(), ',');

If I use the above line, I get the following error:

I've to get the tokens from player_data and assign individual tokens to structure element. How to tokenize a std::string?

Re: strtok

elchupathingy2-Jul-10 19:26

elchupathingy

2-Jul-10 19:26

strtok needs char *, but std::string->c_str() returns a const char * and strtok cannot work on a const char * as it modifies the original string as it makes the tokens. So, you can cast it to a char * or make a copy.

Re: strtok

Stephen Hewitt4-Jul-10 14:42

Stephen Hewitt

4-Jul-10 14:42

If you cast it to char* and it works it's sheer fluke. There's a reason that c_str returns a const char * and not a char *: the char array returned by c_str is not guaranteed to be mutable. The details are implementation specific but the sort of things that might happen are:

It works on on a particular STL implementation. Be warned however that it's not portable and could break when you upgrade.
Changes made to the sequence are not seen in the string.
It crashes.

The const is there to make it hard to do the wrong thing. A cast to a char * is how you go about doing the wrong thing.

Steve

Re: strtok

CPallini2-Jul-10 23:36

CPallini

2-Jul-10 23:36

As already suggested, c_str method returns a const char * and you cannot pass it to the strtok function.
As workarounds you may:

Iteratively use the string find method.
copy the string content to a C character array (for instance using strdup) and then use strtok on the latter.

Re: strtok

C^hris L^osinger5-Jul-10 4:24

C^hris L^osinger

5-Jul-10 4:24

std::string tokenizer[^]

image processing toolkits | batch image processing

Re: strtok

Aescleal5-Jul-10 22:03

Aescleal

5-Jul-10 22:03

If you really, really, really have to use strtok and:

- don't mind mangling the string
- are using a C++0x implementation of standard string

you can use &*str.begin() as the argument to strtok. C++0x has tightened up the requirements on string a fair bit so you can get away with it.

However a better solution would be to write something that copies the lump of data you're after into it's own string or use std::regex if your compiler supports it.

Cheers,

Ash

SmallestInt-need algo

mohitadube2-Jul-10 9:48

mohitadube

2-Jul-10 9:48

someone please help me i need algo for this problem!!!

You are given an integer n. Return the smallest integer greater than or equal to n that
contains exactly k distinct digits in decimal notation
Definition
Method signature: long GetSmallestInt(long n, int k)
Constraints
n will be between 1 and 10^18, inclusive.
k will be between 1 and 10, inclusive
Examples
1) 47
1
Returns: 55
Here, k is 1, so we're looking for a number whose digits are all equal. The smallest such
number that is greater than or equal to 47 is 55.
2) 7
3
Returns: 102
We need three distinct digits here.
3) 69
2
Returns: 69
69 already consists of two different digits.
4) 12364
3
Returns: 12411

mohita dubey

Re: SmallestInt-need algo

Richard Andrew x642-Jul-10 9:55

Richard Andrew x64

2-Jul-10 9:55

We don't do homework here.

NumTrans-need alogorithm

mohitadube2-Jul-10 9:45

mohitadube

2-Jul-10 9:45

plesae someone help me i need algo for this code!!

There is an integer K. You are allowed to add to K any of its divisors not equal to 1and K. The
same operation can be applied to the resulting number and so on. Notice that starting from the
number 4, we can reach any composite number by applying several such operations. For
example, the number 24 can be reached starting from 4 using 5 operations:
4 6 8 12 18 24
You will solve a more general problem. Given integers n and m, return the minimal number ofthe described operations necessary to transform n into m. Return -1 if m can't be obtained from n.

Definition---
Method signature: int GetLeastCount (int n, int m)

Constraints
N will be between 4 and 100000, inclusive.
M will be between N and 100000, inclusive.

Examples1)
4576
Returns:
14
The shortest order of operations is:4 6 8 12 18 27 36 54 81 108 162 243 324 432 576
2) 874883462
Returns: 10
The shortest order of operations is:
8748 13122 19683 26244 39366 59049 78732 83106 83448 83460 83462
3) 499991
Returns:
-1
The number 99991 can't be obtained because it’s prime!

mohita dubey

about apihook

rockago2-Jul-10 7:17

rockago

2-Jul-10 7:17

who can tell me, how to hook "AddVectoredExceptionHandler"?
I want to Hook the last of it argument. Modify VectoredHandler (pExceptionInfo->ContextRecord->Eip) of Eip.

Re: about apihook

rp_suman3-Jul-10 0:55

rp_suman

3-Jul-10 0:55

Using a Vectored Exception Handler[^]

--
"Programming is an art that fights back!"

Re: about apihook

rockago3-Jul-10 11:09

rockago

3-Jul-10 11:09

thanks. i will only simple apihook. For example MessageBoxA / W, but this function is to know how to Hook

How i can save DC in Hbitmap...so i can use it Cimage...in SDI MFC

humais2-Jul-10 5:33

humais

2-Jul-10 5:33

How i can save DC in Hbitmap...so i can use in Cimage to save shapes(Rectangles,Circles) on image...

Re: How i can save DC in Hbitmap...so i can use it Cimage...in SDI MFC

Richard MacCutchan2-Jul-10 7:10

Richard MacCutchan

2-Jul-10 7:10

You cannot, a DC is effectively an output device that is created as and when you need to draw on it. Just save enough information about your shapes to redraw them on any DC.

It's time for a new signature.

Re: How i can save DC in Hbitmap...so i can use it Cimage...in SDI MFC

humais2-Jul-10 8:12

humais

2-Jul-10 8:12

i'm not trying to save dc......i'm trying to attach HBITMAP in CIMAGE...i also want to know tht how i can save shapes in Hbitmap??? so i can save jpg through CIMAGE... Confused | :confused:

Re: How i can save DC in Hbitmap...so i can use it Cimage...in SDI MFC

Richard MacCutchan2-Jul-10 8:34

Richard MacCutchan

2-Jul-10 8:34

humais wrote:
i'm not trying to save dc

Well the subject of your post says "How i can save DC in Hbitmap".

humais wrote:
.i'm trying to attach HBITMAP in CIMAGE

I'm not sure what you mean by this, can you make your question clearer?

humais wrote:
.i also want to know tht how i can save shapes in Hbitmap??? so i can save jpg through CIMAGE

Again your question is not clear. As I said earlier, you can save all the information about your shapes so that they may be recreated in some future application.

It's time for a new signature.

Re: How i can save DC in Hbitmap...so i can use it Cimage...in SDI MFC

CPallini2-Jul-10 8:35

CPallini

2-Jul-10 8:35