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I am getting an error in the cout statement??
What should I do??
C:\My Documents\lakshmi\cplusplus\stldeque\test.cpp(28) : error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class std::deque<class std::basic_string<char,struct="" std::char_traits<char="">,class std::allocator<char>
main() {
string alpha[4] = {"nava", "dana", "lakshmi", "pavi"};
deque<string> ids1;
for (int i =0; i<4; i++) {
ids1.push_back(alpha[i]);
}
typedef deque<string>::iterator id_iter1;
for (id_iter1 i1 = ids1.begin(); i1 != ids1.end(); i1++ )
cout << *i1 << "\n";
}
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i changed the iterator initialzation, and changed the order of the include files, and the code worked...
#include <deque>
#include <iostream>
#include <string>
using namespace std;
main() {
string alpha[4] = {"nava", "dana", "lakshmi", "pavi"};
deque<string> ids1;
for (int i =0; i<4; i++) {
ids1.push_back(alpha[i]);
}
deque<string>::iterator id_iter1 = ids1.begin();
for (; id_iter1 != ids1.end(); id_iter1++ )
cout << *id_iter1 << "\n";
}
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How can we make a windows service in ATL.And how can we add methods/functions to it ??
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The easiest is to run Visual Studio Wizard and select ATL service. You'll get all necessary code to register and start the service. If your methods/functions are COM-based, then just insert COM objects (using ATL Wizard). If not, you'll have to do it yourself. (My advice: base your communication protocol with service on COM, it's really easy to implement).
Vagif Abilov
MCP (Visual C++)
Oslo, Norway
If you're in a war, instead of throwing a hand grenade at the enemy, throw one of those small pumpkins. Maybe it'll make everyone think how stupid war is, and while they are thinking, you can throw a real grenade at them.
Jack Handey, Deep Thoughts
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I have an object that derives from CWindowImpl and I would like to make it a drop target. Apparently adding IDropTarget isn't enough and I would like to know what else is required for me to add drag and drop.
My scenario is that I have a TreeView and would like to click on one of the items and drag it onto a custom view and fire off a behaviour based on the item that has been dragged.
Cheers,
Clint
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I have created a WTL Form based APP using the WTL 7.0 Wizard. I insert the ActiveX Control "Sysmon" (System Monitor), having passed the LIBID in the .Init call. I call ::CoInitialize(NULL), since ::CoInitializeEx(NULL, COINIT_MULTITHREADED) will not work.
Now, the System Monitor AX control shows up on the dialog form, but will absolutely not work (the counter bar does not move!).
Then I tried to create the AX using CAxWindow and then the Create call on this. Same result.
I tried to set up proper message routing in the PreTranslateMessage functions, but still I cannot get the performance monitor to move (start counting).
However, creating a MFC form based app, and inseting the same AX on the form, this works like a charm.
What is the issues with WTL? Can anyboy help on this?
Thanks in Advance,
obt
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Love to see the following MFC Property Sheet Wizard ported to WTL framework.
Look at http://www.codeguru.com/propertysheet/PropSheet_Wizard.shtml
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Hi'
I'm writing an ATL component to manage RAS connections.
I've got all my Async Dial stuff operating coreectly, and I've now introduced threads to enable multiple operations to all occur.
Now when I watch the Open Handle Count, I notice it just Keeps growing. The documentation says I should CloseHandle on any threads I create, but wheree is the safest place to do so.
in the destructor?
In the End of the Thread function itself (i'm passing it a This which contains a member variable of the hThread)
Please help... I'm experiencing weird errors on the machine and I'm pretty sure it's related to this.
Thanks so much.
Paul Farry
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If you dont need the handle then close it immidiatly after CreateThread()
/Magnus
- I don't necessarily agree with everything I say
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Can anyone explain why i have to use a namespace specifier in the code below?
#include <set>
using std::set;
class myclass
{
...
set<CString,strcmpfn> myset;
...
myfunc()
{
...
set<CString, strcmpfn>::iterator it = myset.find(szPath);
...
}
};
/Magnus
- I don't necessarily agree with everything I say
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Hi,
I tried to make a std::map of classes like this:
<br />
class A<br />
{ ... };<br />
<br />
typedef map<long, A> AMAP;<br />
As soon as I began experimenting I realized that things were not as simple as I hoped. For example, this code:
<br />
AMAP amap;<br />
amap[10];<br />
Will generate 1 call to A's default constructor and two calls to A's copy constructor. Before I continue experimenting to find the best way to make a map of classes I'd like to hear some advice from people who have already tried this sort of thing. Two specific questions I have are:
1) Is it advisable to have a map of classes?
2) Does anyone know the best way to acheive this?
Any other advice/comments/talk about the subject will be appriciated.
P.S. My class will not only consist of built-in types, but will also have pointers.
Thanks,
James
Drinking In The Sun
Forgot Password?
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One solution I found was to use pointers instead:
typedef map<long, a="" *=""> AMAP;
amap[10] = new A;
This negates the cost of default and copy constructors. However, it does mean that you then have to manage the deletion of the pointers yourself, as empyting the map will just remove them from the map, not from memory. Unfortunatley, auto_ptr does not work here!
I would be interested to see if there are any other solutions, as it seems to be very costly to use anything other than basic types in a container
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I agree that using new and storing pointers is the way to go for any of the STL containers if you don't want the default ctor's and dtor's called unneccessarily. I'd prefer to delete them myself, however the Boost shared_pointer should work fine here, not that I've tried such a thing.
Re. your original question. I guess it depends why you need a collection (multiple instances) of the class in the first place.
Neville Franks, Author of ED for Windows. www.getsoft.com
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I have in fact resorted to pointers for now, which I agree is the best way to go overall.
I would like to find out the best way to have a collection of classes without resorting to pointers, even if it worse than using pointers. I do not have any particular reason why I need a collection of the class - this is purley research.
Thanks,
James
Drinking In The Sun
Forgot Password?
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both the default CTor and the 2 copies come from the insertion of a default value, if the requested key is not found. So if you use:
tmap::iterator it = map.find(key);
if (it != map.end())
else
Frankly, map is my single most used STL class, and I find myself always coding around the operator[].
The two copies come from
1) creating a temp pair<const key,="" value=""> that is passed to insert, and
2) copying the pair<const key,="" value=""> into the map
(frankly, a good library design would not need one of the copies)
You can ignore that if you have classes with "cheap" Copy-CTor's for default-constructed classes, and do complex construction after inserting a default, like this:
value & v = map[10];
v.ReadDataFromHugeFileAndKeepIt();
the same is true for classes that hold System resources (like HANDLE's that are closed in the DTor) and have no acceptable copy contructor.
Peter
One day I might find it quite amusing how touching tongues make life so confusing Anne Clark again [sighist]
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Has someone experience with greta?
void example()
{
string sText="er.r.n.i.e";
match_results results;
rpattern pat("(\\w+\\.)+");
match_results::backref_type brip = pat.match(sText, results);
for(int i=0;i
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Idefix wrote:
I think the parser works but how can i get the single items? Is that possible?
Try:
rpattern pat("{\\w+}\\.");
iterate through your string and extract the text matching the {} tag. Note that I don't know Greta, but this is what you would do with a typical Regex.
Idefix wrote:
Where can I find more documention and information?
Have you tried: http://research.microsoft.com/projects/greta/gretauserguide.htm[^]
Neville Franks, Author of ED for Windows. www.getsoft.com
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Hi,
I want to create ATL control like MS Tab control to use on VB form
How can i create this control in such a way that user can select other controls from VB toolbox and insert it on my control
i tried to register drag and drop target
inside my control but it wouldnt work if user just put the control and not drag it.
i understand that i need to use CComCompositeControl inside my control
but do i need to expose other interfaces for VB?
thanks
tomer
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You need to create an ATL Project from the main wizard, then add the composite control from the 'Add ATL Object' Wizard.
This gives you the basic composition control that you can use in VB.
Professional ATL COM Programming by Richard Grimes has a good chapter on this suject.
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Thanks Rashid, i already tried to create a composite control,but it didnot work on vb,i mean i could not add controls to the composite from VB
i found that MFC use OLEMISC_SIMPLEFRAMESITE and
ISimpleFrameSite
to create a simple frame container
thanks.
tomer dror
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I recently created a composite control using pure ATL and WTL (No MFC) and I had no problems.
You might need to give me more details on what goes wrong ?
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