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by: franky.backeljauw |
last post by:
Hello,
I have a problem with using a copy constructor to convert an object of a
templated class to object of another templated class. Let me first
include the code (my question is below):
<code:templates.h>
#include <string>
#include <iostream>
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by: Terry |
last post by:
Hi,
Can someone please explain what a copy constructor does and how it's
useful? Thanks,
Terry
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by: masood.iqbal |
last post by:
I have a few questions regarding overloaded typecast
operators and copy constructors that I would like an
answer for. Thanks in advance.
Masood
(1) In some examples that I have seen pertaining to
casting class A to class B, the implementation of the
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by: utab |
last post by:
Dear all, I have got a simple example to demonstrate the need for copy
construction but one point is not clear to me. When returning from the
function in main h2 is not constructed why? I marked that point and
that is also obvious from the output
#include <fstream>
#include <string>
using namespace std;
ofstream out("HowMany.out");
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by: utab |
last post by:
Dear all,
So passing and returning a class object is the time when to include the
definition of the copy constructor into the class definition. But if we
don't call by value or return by value, we do not need to use the
copy-constructor. So depending on the above reasoning I can avoid call
by value and return by value for class objects, this bypasses the
problem or it seems to me like that.
Could any one give me some simple examples...
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by: flamexx7 |
last post by:
http://www.rafb.net/paste/results/V3TZeb28.html
In this code, why copy constructor is not called while returning object from
no_arg() . I was trying to find answer in C++ Standard. and there it's
written that
"Whenever a temporary class object is copied using a copy constructor, and
this object and the copy have the same cv-unqualified type, an
implementation is permitted to treat the original and the copy as two
different ways of...
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by: sarathy |
last post by:
Hi,
I need to see the output of the program when no copy
constructor is used. Since by default, there is an implicit one, how
should i perform the override, so as to totally remove the copy
constructor functionality.
Consider the following code.
class Employee
{
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by: Jeroen |
last post by:
Hi all,
I'm trying to implement a certain class but I have problems regarding
the copy ctor. I'll try to explain this as good as possible and show
what I tried thusfar. Because it's not about a certain code syntax but
more a 'code architecture' thing , I'll use simple example classes
(which are certainly not complete or working...) just to illustrate the
idea (and I may make some mistakes because I'm not that experienced...).
The...
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by: SzH |
last post by:
The code below demonstrates that the copy constructor of moo is not
called on the first line of main. In spite of this, g++ (version 4.1.2)
refuses to compile it if I make the copy constructor private. But the
Digital Mars compiler does not complain.
Which compiler is right? (And if gcc is right, why does this restriction
exist?)
Szabolcs
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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: 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: 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: 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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