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by: Pablo J Royo |
last post by:
Hello:
i have a function that reads a file as an argument and returns a reference
to an object that contains some information obtained from the file: FData
&ReadFile(string FilePath);
But , for example, when the file doesnt exists, i should not return any
reference to a bad constructed object, so i need something as a NULL
reference object. I suppose i could return a pointer instead, but i have
some code written with references which...
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by: Pierre Espenan |
last post by:
A have a long integer class. The built integer type within a conditional
statement returns bool false for int i=0 and bool true for any other non
zero value. I want my long integer class to have similar behavior. My
class looks like this:
#ifndef long_int_H
#define long_int_H
#include <string>
using namespace std;
typedef valarray<complex<double> > VCD;
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by: Gent |
last post by:
I have two questions which are very similar:
Is it possible to return an object in C++. Below is part of my code
for reference however I am more concerned about the concept. It seems
like the function below is returning a pointer to pointers who are
GUID. I am trying to write a wrapper to use in my VB code and what I
would prefer to do is be able to return an array of GUID. I remember
(not sure) that the concept of arrays does not really...
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by: Christian Christmann |
last post by:
Hi,
I'm working on my first STL program. My class BitSet
has three private attributes size, curbit and the STL
bit_vector data which contains some bits.
Here is the code for the constructors:
BitSet::BitSet()
:last(-1)
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by: cpisz |
last post by:
At least that is what I think I want to do.
What is the proper way for me to return multiple data member objects
from an accessor method in my class while ensuring the data does not
get changed, but allowing iteration through the data?
I tryed returning a const vector but the compiler does not like the
idea of my using an iterator to look through the vector down the
road...I assume because an iterator acts like a pointer and allows you...
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by: Philippe F. Bertrand |
last post by:
Summary - What should a C# bool map to in C++? Are return types
different?
I have lots of methods declared with bool parameters and bool return
type which appear to work without any problems but one method in
particular seems to always return true.
The method is declared in C# as
private static extern
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by: Stacey Levine |
last post by:
I have a webservice that I wanted to return an ArrayList..Well the service
compiles and runs when I have the output defined as ArrayList, but the WSDL
defines the output as an Object so I was having a problem in the calling
program. I searched online and found suggestions that I return an Array
instead so I modified my code (below) to return an Array instead of an
ArrayList. Now I get the message when I try to run just my webservice...
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by: J. Askey |
last post by:
I am implementing a web service and thought it may be a good idea to return a
more complex class (which I have called 'ServiceResponse') in order to wrap
the original return value along with two other properties...
bool error;
string lastError;
My whole class looks like this...
using System;
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by: shapper |
last post by:
Hello,
I have a method:
Roles(CultureInfo culture, RoleType? type, bool? open, bool?
beginWithEmpty, string userRoles)
How can I pass an empty string as userRoles? I tried:
Roles(Thread.CurrentThread.CurrentCulture, RoleType.Administrator,
false, true, new string)
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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: 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: 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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