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by: sahukar praveen |
last post by:
Hello,
This is the program that I am trying. The program executes but does not give
me a desired output.
**********************************************
#include <iostream.h>
#include <iomanip.h>
#include <string.h>
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by: Stub |
last post by:
Please answer my questions below - thanks!
1. Why "Derived constructor" is called but "Derived destructor" not in Case
1 since object B is new'ed from Derived class?
2. Why "Derived destructor" is called in Case 2 since only ~base() becomes
"virtual" and ~Derived() is still non-virtual?
3. Does Case 3 show that we don't need any virtual destructor to make
~Derived() called?
4. Is "virtual destructor" needed only for Case 2?
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by: Fabian Müller |
last post by:
Hi all,
my question is as follows:
If have a class X and a class Y derived from X.
Constructor of X is X(param1, param2) .
Constructor of Y is Y(param1, ..., param4) .
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by: WittyGuy |
last post by:
Hi,
I wonder the necessity of constructor and destructor in a Abstract
Class? Is it really needed?
?
Wg
http://www.gotw.ca/resources/clcm.htm for info about ]
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by: gurry |
last post by:
Suppose there's a class A. There's another class called B which looks
like this:
class B {
private:
A a;
public :
B() { a.~A() }
}
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by: arun |
last post by:
Hello Group,
I have a class A, which has three other members and each member is of a
different class
type.
If I don't create a destructor then the compiler will give me one and
whenever class A is
destroyed (whether on stack or on heap) the destructor of each
different object will be called.
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by: AB |
last post by:
Hi All,
I've got an array of objects, during the execution of the program I'd
like to assign a particular object to a certain element in the object
array. The sample code's like this...
class ClassA
{
public:
ClassA()
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by: piboye |
last post by:
Hi !
I'm a academician in china. I have been intereted in C++ lasting.
In reading the C++ Primer book, i have a trouble about union.
In the book ,it said that union can have constructors and destructor
,or other member functions.
I can understand using constructors and memeber functions,but what
is destructor used for?
I have appealled to the forums in chinese ,but no enough usefull
feedback.
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by: Rahul |
last post by:
Hi Everyone,
I was trying to implement a final class and i start having the
destructor of the final class as private,
class A
{
~A()
{
printf("destructor invoked\n");
|
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,...
|
|
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...
|
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...
|
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,...
|
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...
|
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...
|
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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