C / C++ / MFC

10-Jun-09 4:38

Do anyone know how to convert a vector to a list in Visual C++?
I tried casting, it does not work for me.

Maximilien10-Jun-09 4:42

Maximilien

10-Jun-09 4:42

Are you talking about a std::vector and a std::list ?

Don't think there is a direct conversion, you will need to copy from one to the other.

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Anderson Jogie10-Jun-09 4:55

10-Jun-09 4:55

Yes : std::vector to std::list

What is the best method to copy the data? Can you give an example?

Thanks.

David Crow10-Jun-09 5:02

10-Jun-09 5:02

It's not MFC, but something like:

vector<int> vec;
vector<int>::iterator it;
list<int> l;
 
for (it = vec.begin(); it != vec.end(); it++)
    l.push_back(*it);

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Anderson Jogie10-Jun-09 7:22

10-Jun-09 7:22

I forget to mention it's two different data types see code below:

std::list<rdlresource*> TempRes;
TempRes.clear;
std::vector<rdltemporaryresource*>::iterator it;

for (it = TempResList.begin(); it != TempResList.end(); it++)
TempRes.push_back(*it);

Thanks the help on this.

Anderson Jogie10-Jun-09 9:54

10-Jun-09 9:54

Well I guess it did not compile fully earlier, I am still getting the compiler error message below when I tried to copied the data from a vector to a list.

ompiling...
FSSCHED.CPP
c:\program files\ilps\code\fstool\fssched.cpp(1165) : error C2664: 'push_back' : cannot convert parameter 1 from 'class RDLTemporaryResource *' to 'class RDLResource *const & '
Reason: cannot convert from 'class RDLTemporaryResource *' to 'class RDLResource *const '
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.

fstool.dll - 1 error(s), 0 warning(s)

David Crow10-Jun-09 10:40

10-Jun-09 10:40

That's because your list is for RDLResource* objects while your iterator for that list is for RDLTemporaryResource* objects.

Anderson Jogie10-Jun-09 11:49

10-Jun-09 11:49

Right. So I am having problems transferring the data from the vector to the list.
How do I work around doing that in my case? I tied casting, it compiled but the application crashes at runtime.

Thanks.

David Crow10-Jun-09 11:58

10-Jun-09 11:58

Anderson Jogie wrote:
How do I work around doing that in my case?

That's impossible to tell since I know nothing of either of those two classes. For example, how would you copy a vector of Automobile objects to a list of Animal objects?

Anderson Jogie wrote:
I tied casting, it compiled but the application crashes at runtime.

That would not work unless the two classes had a "is a" relationship.

Jim Crafton11-Jun-09 3:49

Jim Crafton

11-Jun-09 3:49

DavidCrow wrote:
That would not work unless the two classes had a "is a" relationship.

Reading that it occurred to me that a more casual (possibly less informed) reader might look at that, pause, and then have their head explode. Smile | :)

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David Crow12-Jun-09 2:36

12-Jun-09 2:36

I agree.

Maximilien10-Jun-09 5:02

Maximilien

10-Jun-09 5:02

I'm not an STL expert, but after a quick google (bing did not give valid answers in the first few pages), here are a couple of solutions (adapt to your particular situation)

std::copy (v.begin (), v.end (), std::back_inserter (l))

std::list<int> l(v.begin(), v.end());

or ...

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Jim Crafton11-Jun-09 3:50

Jim Crafton

11-Jun-09 3:50

So you binged it, but it bonged out?

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How do I get the handle of a dialog in Visual C

Dustin Henry10-Jun-09 7:01

Dustin Henry

10-Jun-09 7:01

Just so you know, std::vector and std::list have nothing to do with MFC. They are part of STL or Standard Template Library and are cross platform.

jonsey2984710-Jun-09 4:15

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 4:15

Hello,

I am porting a Dialog based application that I used Lcc-Win32 to develop over to Visual C++.

How to I get the handle of my Dialog box?

Thanks in advance for your help.

David Crow10-Jun-09 4:26

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 4:26

jonsey29847 wrote:
How to I get the handle of my Dialog box?

For what purpose?

led mike10-Jun-09 4:29

led mike

10-Jun-09 4:29

That question confuses me. What am I missing Dave? Just curious.

Re: How do I get the handle of a dialog in Visual C

David Crow10-Jun-09 4:31

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 4:31

led mike wrote:
That question confuses me.

Mine or the OP's?

led mike10-Jun-09 4:48

led mike

10-Jun-09 4:48

Oh, sorry, yeah yours

Re: How do I get the handle of a dialog in Visual C

jonsey2984710-Jun-09 7:15

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 7:15

So I can use existing code in an application that I developed using Win32 APIs. i.e.SendMessage(HWND, ID, wparam, lparam)

MFC "Hides" this from me.

However, if I am taking off in wrong direction I would appreciate some guidance here.

Thanks

David Crow10-Jun-09 7:53

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 7:53

If you wanted to send a message to some edit control, you could use:

m_edit.SendMessage(WM_GETTEXTLENGTH, 0, 0);

::SendMessage(m_edit.GetSafeHwnd(), WM_GETTEXTLENGTH, 0, 0);

m_edit.GetWindowTextLength();

jonsey2984710-Jun-09 8:15

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 8:15

You have struck upon one of the problems I have using MFC.
What does m_edit mean and where can I find a list of all the m_whatever?

Thanks

David Crow10-Jun-09 8:18

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 8:18

jonsey29847 wrote:
What does m_edit mean and where can I find a list of all the m_whatever?

It's just an arbitrary name I chose for that code snippet. You may call it whatever you wish.

jonsey2984710-Jun-09 8:31

Re: How do I get the handle of a dialog in Visual C

10-Jun-09 8:31

Is it the name I assign using the class wizard?

David Crow10-Jun-09 8:32