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by: Mysooru |
last post by:
How to restrict an object to be instantiated only using new operator?
I mean, one should not be allowed to create an object like AnObject obj; it
should be AnObject obj = new AnObject;
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by: Mikhail |
last post by:
Hi ,
Does anybody know -how many elements could be in SQL operator IN?.
As an example DELETE FROM emp WHERE ename IN (NULL, 'king',...,N);
Thank you in advance .
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by: Pmb |
last post by:
I've been working on creating a Complex class for my own learning purpose
(learn through doing etc.). I'm once again puzzled about something. I can't
figure out how to overload the assignment operator.
Here's what I'm trying to do. I've defined class Complex as
class Complex {
friend ostream &operator<<( ostream &, Complex & );
public:
Complex( float = 0.0, float = 0.0 );
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by: sven_c_t |
last post by:
Hi!
Probably a newbie question. I´ve been working a bit with the widget
toolkit FLTK and I have been wondering why there is such a heavy use of
the new operator, when it does not seem to be nessesary (at least to
me). What follows is an example taken from the FLTK tutorial:
-------------
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
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by: gary |
last post by:
Hi,
We all know the below codes are dangerous:
{
int *p = new int;
delete p;
delete p;
}
And we also know the compilers do not delete p if p==NULL.
So why compilers do not "p = NULL" automatically after programs do "delete p"?
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by: infobahn |
last post by:
printf("%p\n", (void *)0); /* UB, or not? Please explain your answer. */
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by: Michael |
last post by:
Hello dear .Net experts
I have created a Visual C++ class library (.net) project with two classes named Base and Derived wher
Derived inherits from Base. When I add a destructur to base I get the following linker error
Common.obj : error LNK2001: Unresolved external symbol "void __cdecl __CxxCallUnwindDtor(void (__thiscall*)(void *),void *)" (?__CxxCallUnwindDtor@@$$J0YAXP6EXPAX@Z0@Z
This does not happen when there is no detructor in...
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by: John Goche |
last post by:
Hello,
Could anyone please provide with some information on the
C++ overloaded cast operator and in which circumstances
this might be useful? I have consulted several references
but found no information on the uses of this operator.
Thanks,
JG
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by: Virtual_X |
last post by:
i am beginner to c++ when i open the file "stdio.h" i have found the
line
_CRTIMP int __cdecl remove (const char*);
and similar lines to it
so what's "_CRTIMP"
and
"__cdecl"
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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.
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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: 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: 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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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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by: bsmnconsultancy |
last post by:
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