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by: Alexander Stippler |
last post by:
Hello,
I want to build up an inheritance structure looking like two coupled dreaded
diamonds. It's similar to an old posting of me. Now my question is, where
to use the keyword virtual.
CV
/ \
/ \
V CDV
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by: Michael Winter |
last post by:
Until about 5 minutes ago, I was happy with my knowledge of virtual
functions - then I read "Mixing interface and functional inheritance"
posted by Kevin L. earlier today. All of a sudden, I found out that
you can inherit using the virtual keyword:
class A
{
}
class B : public *virtual* A
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by: Corno |
last post by:
Hi all,
I know there are quite a few arguments in favor or against MI. I know there
are a lot of usenet discussions about wether MI is actually needed or not.
These discussions mention the 'dangers' of MI.
The problem is; I know that there are dangers concerned with MI and I know
how I can avoid them, I just don't have a clear idea of what the dangers
actually are and if they are applicable to to the situations I encounter.
The only...
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by: puzzlecracker |
last post by:
I am sure people are familiar with dirty diamond problem solved by
virtual inheritance. look at the code below and tell me how many
instances of the base class (in this case A) does class D receive?
class A
{
:
:
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by: Xavier |
last post by:
Hi,
I have a question, in a "dreaded diamond" situation, regarding the
following code:
---- Begin code
#include <iostream>
using namespace std;
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by: emma middlebrook |
last post by:
Hi
I come from a C++ background and so am familiar with the 'dreaded
inheritance diamond' i.e. the ambiguity of which data to use when a
class appears twice in the hierarchy. Here's a link for anyone not
familiar: http://www.parashift.com/c++-faq-lite/multiple-inheritance.html#faq-25.8
..
Base
/ \
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by: Bruno van Dooren |
last post by:
Hi all,
i am having a problems with inheritance.
consider the following:
class A
{
public:
A(int i){;}
};
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by: Klaas Vantournhout |
last post by:
Hi,
Recently I obtained a problem with virtual inheritance when implementing
it in multiple files. To present the problem I have included at the
bottom of this post the code of the 4 files. I show results with the
gnu compiler but i have the same results with the intel compiler.
file1.cpp compiles without a problem, the problem occurs when compiling
file2.cpp. It complains about not finding the constructor of the class
base.
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by: 2005 |
last post by:
Hi
What is the purpose of declaring a class with a "Virtual" in front?
What is the benefit?
Thanks
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
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