C / C++ / MFC

18-May-09 20:27

hi,

i know how to count number of objects created for class using static variable,

but i came to know that there is other way i.e using container class,

can any one specify how it is and if any code it will be helpfull or even links are
accepted..

iam attending interviews these questions asked for me.. so please helpme.. ( i answered this but dont know how to write code for this).

CPallini18-May-09 21:26

18-May-09 21:26

Have you heard about Google [^]?
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]

hawk23reddy18-May-09 23:14

18-May-09 23:14

hello pallini Rose | [Rose]

,

i know google is there then y is code project is there c i can even post here right which i fell is the best so never try to answer like this is u dont feel of answering then please never ever try.
( i belive in code project and myself and also internet so no need of ur answers any more)hope u got what i mean.
then if google is there then y code project is needed ?

Mad | :mad:

CPallini18-May-09 23:53

18-May-09 23:53

hawk23reddy wrote:
so never try to answer like this is u dont feel of answering then please never ever try.

And why? Is it the "hawk23reddy's rule"? Do you really think I will follow it?

hawk23reddy wrote:
i belive in code project and myself and also internet so no need of ur answers any more

I'm happy about.

hawk23reddy wrote:
hope u got what i mean.

Possibly, you know, I'm a "rather dull child"... Roll eyes | :rolleyes:

hawk23reddy wrote:
then if google is there then y code project is needed ?

Both are useful. And they are more useful if you post the right question to the right one, I suppose.

Smile | :)

hawk23reddy19-May-09 0:57

19-May-09 0:57

thankx,, what to do myan iam poor in lang...

CPallini19-May-09 1:23

19-May-09 1:23

hawk23reddy wrote:
thankx,, what to do myan iam poor in lang...

I don't know. On the other hand, I'm pretty sure that your previous post was a bit rude. Anyway I don't care.
Smile | :)

BadKarma18-May-09 22:19

BadKarma

18-May-09 22:19

Hi,

a container or collection holds/stores a number of objects.
The STL library provides a number of containters.

#include <vector>

class MyObject
{
public:
  MyObject() {}
  
  void DoSomething() {}
};

void main()
{
  std::vector<MyObject*> vecList;

  vecList.push_back(new MyObject);
  vecList.push_back(new MyObject);
  vecList.push_back(new MyObject);

  // count will hold the number of objects
  int count = vecList.size();
}

Learn from the mistakes of others, you may not live long enough to make them all yourself.

segmentation fault issue in derived class assigment [modified]

«_Superman_»18-May-09 23:42

«_Superman_»

18-May-09 23:42

Create a static int variable inside the class.
Increment it in the constructor and decrement it in the destructor.

«_Superman_»
I love work. It gives me something to do between weekends.

hawk23reddy18-May-09 19:35

Re: segmentation fault issue in derived class assigment

18-May-09 19:35

hi this code causes segmentation fault can u pleases y.

class ab
{
   public:
          virtual void abb()=0;
};
class bc : public ab
{
   public:
          void abb()
          {
            cout<<"here";
          }
};
void get(ab* c)
{
   bc *cc = new bc();
   c = cc;//i know this is culprit
}
int main()
{
  ab *b = NULL;
  get(b);
  b->abb();
}

but how can i solve this so that i need to fill derived class object (reference or pointer) to base class in get function only..

[my request] Confused | :confused:

if u feel iam very poor in basics
for give me plz by only this
i can learn more and attain like u
[/my request] Cry | :((

modified on Tuesday, May 19, 2009 2:03 AM

Taran918-May-09 19:55

Taran9

18-May-09 19:55

First of all, you have forgotten to derive bc from ab here.

hawk23reddy wrote:
class bc

Secondly, change the signature of get from

hawk23reddy wrote:
void get(ab* c)

hawk23reddy wrote:
void get(ab** c)

and while calling get, pass address of b as argument.

Re: segmentation fault issue in derived class assigment

tolw18-May-09 19:59

tolw

18-May-09 19:59

Try this:

...
void get(ab* &c)
...

Research passing arguments to functions and especially passing arguments by reference.

Re: segmentation fault issue in derived class assigment

hawk23reddy18-May-09 20:05

eqiuvalent function t ogetPixel()

18-May-09 20:05

thank u. i got it..

Sakthi.Gs :-)18-May-09 19:05

Sakthi.Gs :-)

18-May-09 19:05

Hi...

I am going to convert my codings Visual c++ to java...
I just want to know ..
Do we have any function in java which equivalent to [ GetPixe() in Visual C++ ] ...

thanks in advane

Re: eqiuvalent function t ogetPixel()

Chandrasekharan P18-May-09 19:09

Chandrasekharan P

18-May-09 19:09

This will help you

http://www.permadi.com/tutorial/javaGetImagePixels/index.html

Hi!I tuan_chaos@yahoo.com.vn

tuan111118-May-09 15:56

tuan1111

18-May-09 15:56

Please provide sourcecode: identification, management mouse, keyboard, VGA
sourcecode divided into multiple drives disk

Register contains API functions: to create windows, shutdown
The source on the new machines to complete, there are Operating System
Thanks
Big Grin | :-D

enhzflep18-May-09 16:32

enhzflep

18-May-09 16:32

Need build skynet. Please send code.

CPallini18-May-09 21:41

18-May-09 21:41

You should choose the joke icon for such a post.
Alternatively you might read forum posting guidelines [^], before doing it.
Smile | :)

Michael Schubert19-May-09 1:34

Michael Schubert

19-May-09 1:34

Did you notice the member icon of this guy? It says "financialadmin". WTF?