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by: Thomas Matthews |
last post by:
Hi,
I have three classes:
Category
Author
Publisher
Each of these classes stores its information into
a database table of <ID, text>. (They are fields
that have a foreign key.) There is only one
table for each instance of these classes (IOW,
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by: Erik Arner |
last post by:
Hi, I really need some help here. After upgrading to g++ 3.4 I have run
into all sorts of troubles that I'm sure depends on my lack of proper
understanding of C++. I would now like to get it right once and for all,
if possible.
Most severe is the problem illustrated by the code below. It's based on
the "pluggable factory pattern" described...
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by: Jon Slaughter |
last post by:
Is there any way to declare a member of a base class to make the itself in
the derived class to be static?
i.e., I have two classes
class Base
{
protected:
char *name;
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by: Adam H. Peterson |
last post by:
I just made an observation and I wondered if it's generally known (or
if I'm missing something). My observation is that static protected
members are essentially useless, only a hint to the user. They don't
actually protect any encapsulation or anything, and for all the actual
protection they offer, they might as well be public.
For...
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by: shablool |
last post by:
Hi all,
Could someone please explain what is wrong with this code (the compiler
complains about "'int_type' is not a member of 'B'"):
struct B;
template <typename DerivedT>
struct A
{
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by: Diebels |
last post by:
Hi,
I have some problems using static variables which results in a core
dump. I have attached code and coredump to the end of my message.
I am trying to implement a kind of factory design. I have a base class
with several sub classes. In runtime I want to create a instance of a
sub class and assign it to a base class pointer. Nothing...
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by: Rennie deGraaf |
last post by:
I'm writing a class similar to this:
#include <iostream>
using namespace std;
template<class t> class Foo
{
private:
class Bar
{
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by: =?Utf-8?B?Y2FybG0=?= |
last post by:
Hello,
I searched for an answer to my question and found similar posts,
but none that quite addressed the issue I am trying to resolve.
Essentially, it seems like I need something like a virtual static
function (which I know is illegal), but, is there a way to provide
something similar? The class that is the target of my inquiry is a...
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by: Juha Nieminen |
last post by:
As we know, the keyword "inline" is a bit misleading because its
meaning has changed in practice. In most modern compilers it has
completely lost its meaning of "a hint for the compiler to inline the
function if possible" (because if the compiler has the function
definition available at an instantiation point, it will estimate whether
to...
|
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. ...
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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...
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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...
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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...
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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...
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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...
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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...
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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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