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Hey, it wasn't me who started it...
I just didn't want to miss the fun 
Florin Crisan
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Hello all,
When you have two classes and one of them inherits from the first one [CB inherits from CA], you can use functions in the parent class [CA] by setting them as virtual and protected or public from the child class [CB].
I would like to know if I can do the same with Windows messages.
What do I need is to be able to process the message in the parent class [CA] and not in the child class [CB] without calling the CA event:
I don't want to do this:
void CB::OnSize(UINT nType, int cx, int cy)<br />
{<br />
CA::OnSize(nType, cx, cy);<br />
}
Can this be automated?
As always thank you in advance.
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Joan Murt wrote: When you have two classes and one of them inherits from the first one [CB inherits from CA], you can use functions in the parent class [CA] by setting them as virtual and protected or public from the child class [CB].
Well if your inherited class overrides base class virtual functions, the base ones will NOT be called implicitely.
Joan Murt wrote: I would like to know if I can do the same with Windows messages.
You have to do it explicitely.
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.
[my articles]
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I've searched for that on the Internet and not found anything and thought to ask for it here but without a lot of hope...
Anyhow this is not a lot of job so it's OK.
Thank you CPallini.
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Hello everyone,
I am wondering except when there is no memory on heap, are there any other situations when we will get bad_alloc exceptions? For example, invalid input of the size (e.g. very huge number or zero or negative number) will cause exception?
thanks in advance,
George
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MSDN http://msdn2.microsoft.com/en-us/library/6512dwes(VS.71).aspx[^] is a bit laconic about, but seems to go on the way you depicted. BTW, Why don't you make a little test and tell us your findings?
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.
[my articles]
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Hi CPallini,
It seems bad_alloc only occurs when there is no memory or not enough memory (as showed in the sample). And we can not input invalid value, like -1, compiler will fail. Do you agree with me?
BTW: what situations do you find you met with bad_alloc?
regards,
George
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George_George wrote: It seems bad_alloc only occurs when there is no memory or not enough memory (as showed in the sample).
Maybe, see the following lines.
George_George wrote: And we can not input invalid value, like -1, compiler will fail. Do you agree with me?
Well, a negative integer is casted to a size_t one, that is an unsigned one, since -1 turns out to a very big unsigned value (4294967295), the compiler is able to detect the error. But a silly trick like the following
int *p;
int a=1;
int b=rand()> RAND_MAX / 2 ? 1 : 2;
try {
p= new int[-a*b];
}
catch(...)
{
printf("Exception, George!\n");
}
makes the compiler happy but an the exception is thrown at run-time.
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.
[my articles]
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Thanks CPallini,
Cool!
regards,
George
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Did you check when you want to allocate memory?
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Thanks Hamid,
What do you mean check? Check what?
regards,
George
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When you want to allocate dynamic memory did you check for example use of try/catch?
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Hi Hamid,
Which example do you mean? URL please?
regards,
George
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No I said for example use of try/catch not Example. 
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Hi Hamid,
I am confused, which sample do you mean? If you mean anything of this forum, could you provide a link please?
regards,
George
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No I said (for example) not a example.dont worry
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dear all
how to set path in setting of option? anyone has experience or some detail to introduce this? thanks a lot.
Li Zhiyuan
5/1/2008
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What are you talking about ?
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Hey Tox, was you on vacation, wasn't you?
Happy New Year and best wishes.
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.
[my articles]
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yup, and to be fully exact, I'm still on vacation.
I was off from Codeproject because I went to Lithuania for the new year
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Do you mean additional search paths for include files?
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.
[my articles]
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yes, you are right, when we go to tool-> option, we can see executable file..but we also can choose include file, how to set the path there? i encountered a problem, after compilation,output showed me:
fatal error C1083: Cannot open include file: 'Centroids.h': No such file or directory
so i dun know how to set this path.
thanks
Li Zhiyuan
5/10/2006
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Well, IMHO, the best behaviour will be to put your Centroids.h header file inside the project source folder (where is, for instance Centroids.cpp) and then use:
#include "Centroids.h"
into Centroids.cpp.
However, if you really need to put Centroids.h in a special folder, then, adding such a folder to the VC++ include directories isn't difficult:
(1) Choose Tools->Options menu item
(2) Select Project and Solutions->VC++ Directories node.
(3) Select Include Files item in the Show Directories for list.
(4) Choose the New line (folder icon) button or press CTRL+INS key combination.
(5) Add the path of the folder wherein Centroids.h is (you can browse for).
(6) Enjoy compilation (remember the #include "Centroids.h" in the source code)
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.
[my articles]
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yes, actually i did like this already, centroids just is a class in my header file... i installed vc++ 2005 in D driver, but my project in C driver..so i added a direcotry included my project in C driver...but the problem is still like this
Li Zhiyuan
5/10/2006
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li zhiyuan wrote: i installed vc++ 2005 in D driver, but my project in C driver.
That shouldn't be a problem.
Check well all that you've made.
You can also try to start from zero agin.
Good luck.
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.
[my articles]
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