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by: cppaddict |
last post by:
Hi,
I know that it is illegal in C++ to have a static pure virtual method,
but it seems something like this would be useful when the following 2
conditions hold:
1. You know that every one of your Derived classes will need to
implement some method, but implement it differently, and that the base
class cannot implement it. This is where pure virtual comes in.
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by: Howie |
last post by:
Hi,
i have a normal class:
//test.h
class CForwardData;
class CTest
{
CForwardData *pData;
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by: Kirk Marple |
last post by:
Just want to see if this is 'by design' or a bug...
I have a common List<T> defined in a base class, and the base class has a
static property to expose this list.
I wanted the derived class to add items to this list, but have the base
class hold the data and expose the property.
Problem is, however, that the derived class' static constructor doesn't get
called when DerivedClass.MyList is accessed, so the list has no members. If
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by: Dan |
last post by:
I have a need to make a set of classes that all share the same public
methods, some implementation and some data. So, I made an abstract
base (BaseClass) with an interface (IBaseClass) and a handful of
inherited classes. The static method calls the ctor of the appropriate
inherited class and returns it as type IBaseClass. There are no new
methods or properties in the inherited classes and public clients never
need to know which...
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by: Dennis |
last post by:
I have a class named myclass that inheirits from "baseclass". There is a
property of "baseclass" that I don't want exposed in the IDE. The MSDN
documentation says"
"A derived type can hide an inherited member by defining a new member with
the same signature. This might be done to make a previously public member
private or to define new behavior for an inherited method that is marked as
final. "
However, this does not hide the...
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by: MSDNAndi |
last post by:
Hi,
I have a baseclass (non-static) with some static and some non-static
methods/fields/properties.
In the baseclass in one of the static methods I need to do something like
"
somelogic
....
CallToStaticMethod();
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by: Steve Richter |
last post by:
in a generic class, can I code the class so that I can call a static
method of the generic class T?
In the ConvertFrom method of the generic TypeConvert class I want to
write, I have a call to the static Parse method of the conversion
class.
if (InValue is string)
return T.Parse((string)InValue);
else
return base.ConvertFrom(context, culture, InValue);
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by: Aflj |
last post by:
This code won't compile (two compilers tried, gcc and VC++, both of recent versions, but I don't remember them exactly):
class C1
{
public:
void M1(int i) {}
};
class C2: public C1
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by: dmjpro |
last post by:
Look at my code carefully.....
class Super
{
protected int a;
}
class Derived extends Super
{
protected int a; //Here Data Overriding or Data Hiding
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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: 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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