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by: mem |
last post by:
Concrete classes are ones that can be instantiated directly, as long as it
doesn't have pure virtual function.
However, people suggest that "Don't derive from concrete classes."
Does this mean that either make it abstract base class for it to be
derivable or keep them as "concrete" not to be derived at all? Then what's
the purpose of "concrete classes" of ordinary virtual function(s)?
Thanks!
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by: Mike P |
last post by:
I have a class with a dozen+ properties, some of which will be set a
value, and some not, depending on the constructor called. I also have a
method which has only one overload and all of the properties are being
sent to it.
My question is, because some of these properties will not be initialised
by the constructor used, calling this method in some cases will crash my
app unless I initialise all the properties at some point in my class....
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by: bryanhobson |
last post by:
I'm fairly new to c#, and I am just trying to work out how a
'properties' dialog works.
Currently in my code, I have an object represented by the class 'Dog'.
The dog object has several properties.
I have added a new windows form, class 'DogProperties'. I'm attempting
to use this to allow the user to edit the properties of an instance of
'Dog'.
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by: zeng.hui.stephen |
last post by:
I download the demo
http://msdn.microsoft.com/msdnmag/issues/02/10/cuttingedge/. I
inherite the demo, and write my code.
I want to use Hook to monitor C++ Edit change. I use a C# form
containing a Edit(textbox) and button to test at first. When I change
text in Edit or press button to setText value, I want to monitor the
change event.
But the event code always return 0, why?
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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: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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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: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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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:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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