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by: pablo |
last post by:
Dear NewsGroupers,
I am relatively new to OOP and cannet get my head around this problem.
I have two classes. Class Child extends Parent.
There is no constructor for the Child class. So when I create a child object
the constructor for the parent object is called. That works fine.
But now I have the problem that I want to add an already existing Parent
object to create a new Child object. How can this be done?
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by: Suzanne Vogel |
last post by:
Hi,
I've been trying to write a function to test whether one class is
derived from another class. I am given only id's of the two classes.
Therefore, direct use of template methods is not an option.
Let's call the id of a class "cid" (for "class id").
The function signature should look like this:
******************************************
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by: Dave |
last post by:
Hello all,
After perusing the Standard, I believe it is true to say that once you
insert an element into a std::list<>, its location in memory never changes.
This makes a std::list<> ideal for storing vertices of an arbitrary n-ary
tree where a vertex contain pointers to its parent / children. These parent
/ child vertices need to stay put if we've got pointers to them somewhere!
Am I correct in my assertion?
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by: jalkadir |
last post by:
Let's say that I have this class:
class Parent{
private: char* str;
public: const char* getStr(){return str;}
};
And then I create a child class
class Child{
private: std::string str;
public: std::string& getStr(){return str;}
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by: Fleckman |
last post by:
I have a situation where I need to add rows to tables with a Parent-Child
relationship which presents a constraints violation when I reject the
changes. Here is the scenario:
I add a row to a Parent table which then causes a row to be added to the
Child table referencing the parent row. The Child table rows can be modified
by multiple processes so I need to manage row additionals separate from row
modifications in terms of how they are...
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by: Danny Tuppeny |
last post by:
Hi all,
I've been trying to write some classes, so when I have a parent-child
relationship, such as with Folders in my application, I don't have to
remember to add a parent reference, as well as adding to the child
collection, eg:
parent.Children.Add(child);
child.Parent = parent;
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by: msxkim |
last post by:
How to execute functions in the parent class first and then functions
in the child class? For example, I have a parent class with functions
'ONE' and 'TWO' and child class has a function 'THREE'. How should I
declare classes so that all three functions are executed when child
class is called?
Class Parent
public function ONE
'code
end fuction
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by: Eddie |
last post by:
If FormMain = MDI parent, FormSub = Child parent,
I execute FormSub from the menu like this way.
FormSub^ sub = gcnew FormSub;
sub->MdiParent = this;
sub->Show();
This can generate child form sub in FormMain.
In th FormMain, there is status bar label named statusBar;
I'd like to add code in the sub form that can access statusBar of parent
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by: Goran Djuranovic |
last post by:
Hi all,
Does anyone know how to declare a variable in a class to be accessible ONLY from a classes instantiated within that class?
For example:
************* CODE *****************
Public Class Parent
'*** HOW TO DECLARE IT ***
Dim Age As String = "1/1/2000"
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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: 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: 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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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