C / C++ / MFC Discussion Boards

Re: Linked Lists

CPallini18-Jan-09 20:06

CPallini

18-Jan-09 20:06

CodingYoshi wrote:
Two linked lists intersect sometimes. What does this mean?

Couldn't you ask your teacher, could you?
Smile | :)

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: Linked Lists

CodingYoshi19-Jan-09 3:32

CodingYoshi

19-Jan-09 3:32

You are making an assumption that everyone has access to a teacher. I googled and found many articles about how to find the intersection of two linked lists but none which explain why would they intersect and when/why would you want them to intersect. A real life example will help.

I have been programming for quiet a while but I never had to find out if two linked lists intersect. BTW I mostly have been using managed languages.

Re: Linked Lists

CPallini19-Jan-09 3:43

CPallini

19-Jan-09 3:43

I made such an assumption, because your request looked like an homework assignment. I may be wrong, occasionally. Roll eyes | :rolleyes:

Re: Linked Lists

Stephen Hewitt19-Jan-09 1:27

Stephen Hewitt

19-Jan-09 1:27

In set theory, the intersection on two sets is a third set that contains all the elements the first two have in common.

Steve

Re: Linked Lists

David Crow19-Jan-09 3:14

David Crow

19-Jan-09 3:14

CodingYoshi wrote:
What does this mean?

It means it's a coincidence that both lists contain a node having the value 2.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Linked Lists

CodingYoshi19-Jan-09 3:28

CodingYoshi

19-Jan-09 3:28

Okay lets reword the question. Why would someone want the linked lists to intersect? Advantages or Disadvantages?

Re: Linked Lists

David Crow19-Jan-09 3:31

David Crow

19-Jan-09 3:31

CodingYoshi wrote:
Why would someone want the linked lists to intersect?

No reason that I can think of. Yes it's possible, but I've never heard of such an implementation. If you are visualizing something like:

class set : public list
{
};

This says that a set is-a list, which it can't be because a set does not do everything that a list does. Perhaps you wanted a has-a construct where the set contains a list.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Linked Lists

CodingYoshi19-Jan-09 5:08

CodingYoshi

19-Jan-09 5:08

Lets forget sets and concentrate why linked lists would intersect and why/when would someone do this.

Re: Linked Lists

David Crow19-Jan-09 5:11

David Crow

19-Jan-09 5:11

CodingYoshi wrote:
Lets...concentrate why linked lists would intersect and why/when would someone do this.

I already answered that.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

How to show an image within an RichEdit control?

Joseph Marzbani18-Jan-09 18:44

Joseph Marzbani

18-Jan-09 18:44

If It's difficult to explain here, you can direct me to a link or something on that. Rose | [Rose]

Thank you masters!

Re: How to show an image within an RichEdit control?

_AnsHUMAN_ 18-Jan-09 18:59

_AnsHUMAN_

18-Jan-09 18:59

LIKE THIS...[^]

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: How to show an image within an RichEdit control?

Hamid_RT18-Jan-09 19:18

Hamid_RT

18-Jan-09 19:18

A Rich Edit Control That Displays Bitmaps and Other OLE Objects[^].

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: How to show an image within an RichEdit control?

Joseph Marzbani18-Jan-09 20:29

Joseph Marzbani

18-Jan-09 20:29

Congratulations! You're a GOLD member now?

Thank you masters!

Re: How to show an image within an RichEdit control?

Hamid_RT18-Jan-09 22:51

Hamid_RT

18-Jan-09 22:51

Thank you but gold member is not new!
Smile | :)

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

How to save the content of an RichEdit control as a record in MS-Access database?

Joseph Marzbani18-Jan-09 18:41

Joseph Marzbani

18-Jan-09 18:41

Hi everyone!

I'm using CDatabase & CRecordSet (ODBC in MFC) and I wonder how can I save the content of an RichEdit control as a record (or better to say: a field) in MS-Access database (*.mdb).

Thank you masters!

Re: How to save the content of an RichEdit control as a record in MS-Access database?

Stuart Dootson18-Jan-09 22:07

Stuart Dootson

18-Jan-09 22:07

You probably want a field that's a BLOB type (I guess Access would call that Attachment type?), then you can just store the raw bytes of the CRichEdit control (accessed via the CRichEditCtrl::StreamIn[^] and CRichEditCtrl::StreamOut[^] methods) in that field, specifying some of your code in the pfnCallback field of the EDITSTREAM[^] structure you pass to the method.

Of course, you could just store the text (as opposed to the rich text, but accessed via the same methods) in a sufficiently large Text field.

Re: How to save the content of an RichEdit control as a record in MS-Access database?

David Crow19-Jan-09 3:21

David Crow

19-Jan-09 3:21

Access has a OLE Object field type. That is used to hold large, binary data.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

read a ms word document using vc++

AVIHAR18-Jan-09 18:10

AVIHAR

18-Jan-09 18:10

Hi all,

U want to extract text from the ms word document using vc++
Can anybody please help me

Thanks in advance

Re: read a ms word document using vc++

_AnsHUMAN_ 18-Jan-09 18:57

_AnsHUMAN_

18-Jan-09 18:57

AVIHAR wrote:
U want to extract text from the ms word document using vc++

AVIHAR wrote:
Can anybody please help me

Search for "Word Automation" @ GOOGLE[^]

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: read a ms word document using vc++

David Crow19-Jan-09 3:25

David Crow

19-Jan-09 3:25

Import Word's type library into your project. This will add a bunch of Word-related classes to your project. Then you can start with something like:

_Application app;
if (app.CreateDispatch("Word.Application") == TRUE)
{
    Documents docs = app.GetDocuments();
 
    _Document doc = docs.Open(COleVariant("thesis.doc"), vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional);
 
    docs.Close();
 
    app.Quit();
}

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Constructors and Serialization

BobInNJ18-Jan-09 9:34

BobInNJ

18-Jan-09 9:34

I am writing an application using C++ and MFC. A few weeks ago, I wrote the following
line of code:

<br />
IMPLEMENT_SERIAL( CMainWindow, CFrameWnd, 1 )<br />

The code worked. The class CMainWindow has only one constructor and that constructor does not take any arguments. Today, I changed that constructor to take a single argument, a reference to an
fstream object. Now, I get the following error messages from the compiler on the line shown above.
There error messages are:

<br />
error C2512: 'CMainWindow' : no appropriate default constructor available<br />
error C2758: 'CMainWindow::debugFile' : must be initialized in constructor base/member initializer list<br />

Note that debugFile is the name of the formal parameters for the constructor CMainWindow. I would
really like to be able to serialize the class CMainWindow and at the same time, I would like the class constructor to take one argument. What should I do?

Thanks

Bob

Re: Constructors and Serialization

CPallini18-Jan-09 9:53

CPallini

18-Jan-09 9:53

You should follow the 'suggestions' of the two errors, in order to make your class serializable again.
For instance, the documentation [^] states

Defining a Constructor with No Arguments
MFC requires a default constructor when it re-creates your objects as they are deserialized (loaded from disk). The deserialization process will fill in all member variables with the values required to re-create the object.

Re: Constructors and Serialization

Iain Clarke, Warrior Programmer18-Jan-09 23:30

Iain Clarke, Warrior Programmer

18-Jan-09 23:30

CPallini wrote a very nice version of "Tough".

The serialisation mechanism is very good for simple objects, but I've found it to be very fragile when you want to do any real work. I know others here disagree with me on this though!

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: Constructors and Serialization

BobInNJ19-Jan-09 6:09

BobInNJ

19-Jan-09 6:09

Thanks for the responses. It seems to me that the MFC serialization approach is less then ideal. I solved the problem by making the argument to the constructor optional. This is also less than ideal it gets the job done.

Bob

poolObject

rini2518-Jan-09 7:51

rini25

18-Jan-09 7:51

i have a question of how to creat a poolObject
this is the code :
template<class t="">
class objectPool : public GenericObjectPool
{
static objectPool<t> *thePool;
static void createPool()
{
thePool = new objectPool<t>();
//here we need to create the pool itself ...
//or in the c'tor of the parent ..
//the register could happen in the c'tor of the parent
//but we either do it here
....
}
}
can someone help me ?

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