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by: Damon |
last post by:
Hi,
I created a template class and stored its instances in a map object
that is like std::map<std::string, void* >. But i just made a nasty
discovery that if i fail to use a C-style cast properly with the void
pointer to return it to the proper class it belongs to, I get very bad
and random segmentation fault.
So question to all the experts, can I check the type of a void pointer
or use some guaranteed way to elicit an exception...
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by: cjshea |
last post by:
Hello Friends;
I have a general question on Configuration Advisor, as I get to know it
better I may have more focused questions. I have a feeling that the
Advisor may assume that there is only one instance on a server. I have
a situation where I have many instances on one server, with many small
databases, about 20 instances with about 45 databases. Sounds great so
far doesn't it? Anyway my question at this point is when trying to...
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by: David M. Wilson |
last post by:
I know this doesn't specifically pertain to the scope of comp.lang.c,
but I don't know of a better forum to post it on, besides, what is the
practicality of comp.lang.c if it weren't for answers to questions
such as this? :)
I see an awful lot of code on a day to day basis like so:
(void) printf(...);
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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: maadhuu |
last post by:
hello, this is a piece of code ,which is giving an error.
#include<stdio.h>
int main()
{
int a =10;
void *p = &a;
printf("%d ", *p ); //error....why should it //be an error ?can't the
compiler make out because //of %d that the pointer is supposed to refer to
an integer ?? or is explicit type casting required ??
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by: Roland Riess |
last post by:
Hi all,
at the moment i am developing an app which is sort of an interface to
copy data from one database to another and it shall run as a service.
As there are several databases the app must be installed and run in
multiple instances with the configuration data (database, login, etc.)
stored in an app.config file.
Up to now I was concerned with Windows CE apps only so both running an
app as service and running multiple instances of...
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by: Moistly |
last post by:
Hi everyone,
This is a scenerio for my problem,
I have one aspx page with several instances of the same Web User
Control (ascx files).
I have for example the Web User Control that has a textbox that
requires a numeric value (I am using the RequiredField, and
RangeValidator here with no problems)
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by: Brian Withun |
last post by:
I have a base class (B) and several derived classes (D1, D2, ...)
I have a container class (C) with an attribute (void *d) which is
intended to point to any of D1, D2,...
My question is, on my C::GetObject() accessor, what is the most
appropriate return type?
void* C::GetObject( void ) { return d; }
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by: PeterAPIIT |
last post by:
Hello all C++ expert programmer,
i have wrote partial general allocator for my container.
After reading standard C++ library and code guru article, i have
several questions.
1. Why allocator write forward declaration then allocation for void*
rather than directly wrote allocator first ?
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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: 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: 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: 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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