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Did you forget to include the deque header file?
#include <queue>
#include <deque>
using namespace std ;
...
typedef deque<mystruct> MEMBERS_DEQUE;
typedef queue<mystruct> MEMBERS_QUEUE;
Roger Stewart
"I Owe, I Owe, it's off to work I go..."
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I am looking how to measure the performance of the set.h file in the Standard Template Library. This is for a homework assignment. We are required to modify the set.h file with global integer variables to do the following:
I need to know how to count the number of compares and data moves that take place when loading N number of strings into a set or multiset. I tried to open up the set.h and increment counters in a few places, but I have no idea which functions do what. The set.h file is very confusing to me.
Any help is appreciated.
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Why not use the contained object instead?
Just overload constructors and the relevant operators.
And if the paths that I have followed/have tread against the flow/there is no need for sorrow
I am coming home
Return, Crüxshadows
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As they always say "kids, dont try this at home".
Or better, dont try this with the set which shipped with VC6.
Take the STLport (stlport.org[^]), its much more readable and is still a compatible implementation.
Finally moved to Brazil
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I wasn't modifying the original set.h file. I made a copy an placed it in my project file. I simply linked to it absolutely.
Thanks for the other resource tho! Is there a set.h (or similar header file) included in that implimentation?
If it is more readable, it will definitely help.
Thanks,
Brian
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BrianReeve wrote:
I wasn't modifying the original set.h file
Actually I was referring to trying to understand not to modifying the file.
BrianReeve wrote:
Is there a set.h (or similar header file) included in that implimentation?
You bet there is: <set>
Finally moved to Brazil
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You can get these estimates without modifying the source code of std::set. In order to count copying and compare operations, enrich the class you're using as element in the set like follows:
class element_set
{
public:
static unsigned no_of_copying_ops;
static unsigned no_of_compare_ops;
element_set(const element_set& x)
{
++unsigned no_of_copying_ops;
...
}
bool operator<(const element_set& x)const
{
++no_of_compare_ops;
...
}
...
};
unsigned element_set::no_of_copying_ops=0;
unsigned element_set::no_of_compare_ops=0;Hope this helps, good luck.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Hello
I have an ATL object which I call in my JavaScript block on the page. I can pass values to methods of object by I don't know how to modify values.
I need to modify Number variable and String from the method:
This is a method of my object:
STDMETHODIMP CRsaSign::Test(int* pLen,BSTR* pStr)
{
*pLen = 1;
return S_OK;
}
[id(28), helpstring("method Test")] HRESULT Test([in,out]int* pLen,[out]BSTR* pStr);
Here is my script block:
function GenerateKey()
{
var Signature = new String(128);
var SignatureLen = new Number(54321);
objSign.Test(SignatureLen,Signature);
alert(SignatureLen);
}
In debugger I can see value *pLen = 54321 but after
I assign it 1 I see message box with previous 54321.
Maybe someone knows where to read about it or an answer 
Thanks
Vladislav
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Javascript doesn't support [in, out] parameters.
If you are unable to use [retval] you are out of luck...
And if the paths that I have followed/have tread against the flow/there is no need for sorrow
I am coming home
Return, Crüxshadows
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Hi
Thanks for answer.
I used retval - it works.
Slava
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Hi guys,
Ok this is the dilemma I^m facing right now:
I`ve got this template class in which I want to have a static member variable which is shared by all objects of that class no matter what the template parameters were. So I figured I need to create a dummy class with that static parameter and use that.
The way in which to use that now is the question there are 2 options (as far as I can see).
1) I derive the template class from that dummy class
2) I put a member var of that dummy class in the template class.
eg:
class CDummy
{
static int m_nAnInteger;
};
//option nr 1
template<class TParam> class CATemplate: public TParam, public CDummy
{
...
};
//option nr 2
template<class TParam> class CATemplate: public TParam
{
CDummy theDummyObj;
...
};
In the one case I can refer to m_nAnInteger dircty in the other I have to refer to it through the object. In the one case I am dealing with multiple inheretance however and in the other not. So if anybody can tell me which would be the best solution feel free.
Greetz,
Davy
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I'm not normally a great friend of the is_a vs. has_a terminology, but here I find it works and provides good guideance:
Is CATemplate a CDummy? No, it has a CDummy. Thus, composition (your option nr 2) is the answer.
Bernd
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I am trying to figure out a way to create a simple toolbar for IE, or MOZILLA or both..
All I am looking for is to hyperlink to 2 different websites. I am trying to get 2 Main headings for each site, and a drop down list under each for different pages on that site, can anyone help, I am a 26 y/o NEWBEE to programming.
I am hoping to get it too look like this:
Main Topics as if this was the toolbar and drop down menus
CSRA Light Flyers Trenton Flyers
Home Home
Pictures News
News Pictures
Thanks!!
Eric Marenyi
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Hi All,
Does anyone has any idea if ATL7.0 has introduced some better ways of handling errors in COM components ?
Regards,
ARun.
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How do we use REFLECTED_COMMAND_CODE_HANDLER_EX(code, func) to reflect messages in WTL. A sample for the same will be greatly appreciated. Thanks in advance for the help
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How do we reflect messages using REFLECTED_COMMAND_CODE_HANDLER_EX(code, func) in WTL. A sample will be very much appreciated.
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Hi there,
I`m relatively new in the 'template bussiness', so I have a question about what you might consider the most obvious thing concerning templates. If so, I hope I get an answer fast...
If there is a static member variable in a template class, will there be only one such variable for each instance of the template class independent of template parameters, or will every template object with the same template parameters share a static member var? (hope I made the question clear.? )
Greetz,
Davy
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Each instantiation generates its own static variable, i.e. your second alternative is the right one. Short example:
#include <iostream>
using namespace std;
template<typename T>
struct foo
{
static int bar;
};
template<typename T>
int foo<T>::bar=0;
int main()
{
foo<int>::bar=1;
foo<unsigned>::bar=2;
cout<<foo<int>::bar<<endl;
cout<<foo<unsigned>::bar<<endl;
return 0;
}
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Thanks for your reply.
Will need to keep that in mind, because I wanted a static for all objects of the template class regardless the template parameter. I will just need to create a dummy class or so...
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The standard way to achieve this is to derive your template class from a common non-template base:
class whatever_base
{
public:
static int foo;
};
template<typename T>
class whatever:public whatever_base
{
...
};
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Why public inheritance for this? I would use protected inheritance.
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Oh, yep, well maybe, I guess it depends on the usage you want to give to the common static var.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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HI All,
i would like to know how to extract the names of controls like editbox, combobox from running VB/Delphi applications.
Is it possible to get the contents (grid cell values) of the grid(Like DBGrid or MSFlexiGrid) which exists in some running applications.
i would like to know how to find out the exposed methods of that grid.
Thanks in advance
Naveen S G
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Hi All,
I seem to be having the most stupid problem (well I am the stupid one) with retrieving the selected value out of a ComboBox.
Background info:
All my development is within an ATL Com based DLL. I have extended its functionality by including the WTL libraries in the stdafx.h header.
The DLL is a set of tools and dlgs that are loaded into the calling application.
I have read Michael Dunns intro to WTL articles and found them encouraging... hence trying to use them in my project. However I seem to be having trouble implementing the msg maps and ddx maps etc in the dialogs as they seem to crash the calling application. For the calling application and DLL to work, the dialogs must be of type CAxDialogImpl.
I have one Dialog that I have managed to use WTL message maps in and it works ok. However other time it doesn't. I cannot get the DDX map to map the values from my ComboBox to my class members:
<br />
class CTargetDialog : public CAxDialogImpl<CTargetDialog>,
public CWinDataExchange<CTargetDialog>,<br />
public CComObjectRootEx<CComSingleThreadModel>,<br />
public CComCoClass<CTargetDialog><br />
{<br />
public:<br />
CTargetDialog(IApplicationPtr pApp);<br />
~CTargetDialog();<br />
<br />
enum { IDD = IDD_TARGETDIALOG };<br />
<br />
BEGIN_MSG_MAP(CTargetDialog)<br />
MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)<br />
COMMAND_ID_HANDLER(IDOK, OnOK)<br />
COMMAND_ID_HANDLER(IDCANCEL, OnCancel)<br />
COMMAND_HANDLER(IDC_COMBO_TARGET, CBN_SELCHANGE, OnSelchangeCombo_target)<br />
COMMAND_HANDLER(IDC_COMBO_TARGET, CBN_DROPDOWN, OnDropdownCombo_target)<br />
END_MSG_MAP()<br />
<br />
BEGIN_DDX_MAP(CTargetDialog)<br />
DDX_CONTROL(IDC_COMBO_TARGET, m_pComboBox)<br />
DDX_TEXT(IDC_COMBO_TARGET, m_szTargetLayer)<br />
END_DDX_MAP()<br />
<br />
LRESULT OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);<br />
LRESULT OnOK(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
LRESULT OnCancel(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
LRESULT OnSelchangeCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
LRESULT OnDropdownCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
HWND GetPicHandle();<br />
<br />
private:<br />
CComboBoxImpl m_pComboBox;<br />
CString m_szTargetLayer;<br />
IApplicationPtr m_ipApp;<br />
IMxApplicationPtr m_ipMxApp;<br />
IDocumentPtr m_ipDoc;<br />
IMxDocumentPtr m_ipMxDoc;<br />
IEditorPtr m_ipEditor;<br />
IMapPtr m_ipMap;<br />
};<br />
I have defined the CComboBoxImpl in my stdafx.h like
<br />
class CComboBoxImpl : public CWindowImpl<CComboBoxImpl, CComboBox><br />
{ DECLARE_EMPTY_MSG_MAP(); };<br />
So I have pretty much given up on trying to change the message_maps and the DDX stuff, as compiler gives error when I request
<br />
DoDataExhange(true);<br />
That being said and done, how do you get the value from a combo box?
I have tried the following but the itellisense definition of the object is different to what the compiler accepts. Instead of using DDX I have:
<br />
LRESULT CTargetDialog::OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br />
{<br />
m_pComboBox.Attach(GetDlgItem(IDC_COMBO_TARGET));<br />
ATLASSERT(m_pComboBox.m_hWnd != NULL);<br />
<br />
return 1;
}<br />
<br />
LRESULT CTargetDialog::OnSelchangeCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)<br />
{<br />
CString pValueString; <br />
BSTR pBSTR<br />
int i = this->m_pComboBox.GetDlgItemText(IDC_COMBO_TARGET, pBSTR);
this->m_pComboBox.GetLBText(0, pValueString);
<br />
AtlMessageBox(NULL, pValueString.AllocSysString(), _T("Selection"), MB_OK);<br />
return 0;<br />
}
Are the Dialogs meant to work in DLL the same message map way as in EXE? I know they are not in terms of the greater picture, but in terms of there own object entity.
your guidance would be greatly appreciated.
cheers
Bryce
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