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by: Jo Vermeulen |
last post by:
Hello,
I was wondering how I could call the base class constructor from a derived
class constructor. In Java I could do something like
super(parameter);
I tried
base(parameter);
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by: st_ev_fe |
last post by:
I've noticed that when constructing a subclass, the base class get's
it's contructors called.
Is there some way to avoid this? The base class has one variable, which
gets initialised to 0.
The subclass's constructor sets this variable to a real value.
So first the variable is set to 0, the variable is never used before it
once again gets set to a real value. It's a waste. Any ideas anyone?
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by: BDB |
last post by:
Hi,
I'm trying to call a base class' constructor. This is giving me an error:
Use of keyword 'base' is not valid in this context.
....
public class B : A
{
B( int i )
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by: Jeff |
last post by:
The derived class below passes a reference to an object in its own
class to its base calss constructor. The code compiles and will run
successfully as long as the base class constructor does not attempt to
access the object -- since m_object is not actually created and
initizialized until after the base constructor has been called.
Any thoughts on the practice below?
class Base
{
public:
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by: Fedor Semenov |
last post by:
How can I call a base class' constructor from a derived class. Suppose I
have:
class Button // Base class
{
public:
Button(void)
{
// Register classes, create the button, etc.
}
};
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by: ali |
last post by:
Hi,
I am new to C++ and trying to understand how to work on Inheritance
and Operator overloading. I understand that the derived class can pass
the base class constructor in its constructor definition as following
code:
Car::Car(int id, int colorID, int type):Vehicle(id, colorID)
{
this->type = type;
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by: desktop |
last post by:
I am reading a text that says:
"The derived-class constructor initializer names its base-class followed
by a (possibly empty) list of arguments. These arguments are the initial
values to use in constructing the base-class part; the serve to select
the base-class constructor to run in order to initialize the base".
I have then made this example:
#include <string>
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by: Rahul |
last post by:
Hi Everyone,
While working with Java, i came across super() which passes values to
base class constructor from derived class constructor. I was wondering
if this could be implemented in c++ by any mechanism as super is not
supported by c++, atleast by MS vc++ 6.0.
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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: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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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: 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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