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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: Derek |
last post by:
The following simple program causes a runtime error
(pure virtual method called):
struct Base
{
Base() { init(); }
void init() { badIdea(); }
virtual void badIdea() = 0;
};
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by: santosh |
last post by:
Hello,
I was going through the Marshal Cline's C++ FAQ-Lite.
I have a doubt regarding section 33.10.
Here he is declaring a pure virtual destructor in the base class.
And again defining it inline. Like this.
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by: PengYu.UT |
last post by:
Hi,
A pure function is called in the base function constructor. It generate
a run time error: "pure virtual method called".
My problem is that class A have some derived classes. I want A's
constructor change its behaviour accounting to the derived class.
I tried to make A::fun() not pure virtual but virtual. It doesn't
generate any error. But A::fun() is called in A's construction, while I
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by: Martin Vorbrodt |
last post by:
Example code in one of my books intrigues me:
class B {
public:
B* Clone() const {
B* p = DoClone();
assert(typeid(*p) == typeid(*this));
return p;
}
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by: pakis |
last post by:
I am having a problem of pure virtual function call in my project.
Can anyone explaine me the causes of pure virtual function calls other than
calling a virtual function in base class?
Thanks
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by: sks |
last post by:
Hi ,
could anyone explain me why definition to a pure virtual function
is allowed ?
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by: John Goche |
last post by:
Hello,
page 202 of Symbian OS Explained by Jo Stichbury states
"All virtual functions, public, protected or private, should be
exported"
then page 203 states
"In the rare cases where a pure virtual function body
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by: jinendrashankar |
last post by:
Hi All,
1.Please check this code and its output which is working fine
while pure virtual functions( FUN1) prototype of Class CA is different
then Class CB Function (FUN1).
2. In Class CA pure virtual function ( FUN1) have body.
3. If i change my second pure virtual function(FUN2) prototype
class CA----> virtual int fun2()=0;
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by: Jack |
last post by:
Hi,
I meet a question with it ,
I did not get clear the different betteen them,
for example:
#include <iostream>
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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: 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: 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: 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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