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by: Thomas Matthews |
last post by:
Hi,
How do I create a const table of pointers to member functions?
I'm implementing a Factory pattern (or jump table). I want to
iterate through the table, calling each member function until
a non-zero index is returned. Below is my attempt, which
generates compiler errors:
namespace Reference
{
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by: Jim Hudon |
last post by:
i need to create an array of a size determined by a non-const variable:
int char sampleArray;
why does the following not work, and what can i do:
const int constArraySize = arraySize;
int char sampleArray[ constArraySize;
for both of the above, i get the same error message when i compile:
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by: Dylan Nicholson |
last post by:
Is there any way of declaring the parameter "array" below to be const,
so that the function as written will not compile:
void foo(int array /*const*/)
{
array = array; // should not be allowed to point this at another
array!
}
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by: al |
last post by:
char s = "This string literal";
or
char *s= "This string literal";
Both define a string literal. Both suppose to be read-only and not to be
modified according to Standard. And both have type of "const char *".
Right? But why does the compiler I am using allow s to be modified, instead
of generating compile error?
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by: herbertF |
last post by:
Hi guys,
In a program (not my own) I encountered the declaration of a constant
pointer to an array consisting of two other const pointers to arrays.
Not quite sure why they do it so complicated, but is it legal? Most
compilers accept it, but one doesn't recognize the rhs as a constant.
What are the requirements for the rhs in the declaration of a const
pointer? Is the following program legal C?
int main(int argc, char *argv) {
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by: electric sheep |
last post by:
Hi, can somebody explain the following syntax to me.
This is straight from a gnu info file:
int
main(void)
{
/* Hashed form of "GNU libc manual". */
const char *const pass = "$1$/iSaq7rB$EoUw5jJPPvAPECNaaWzMK/";
I think the idea at play here is whether the pointer is constant or not ?
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by: Bilgehan.Balban |
last post by:
Hi,
The following code:
#include <stdio.h>
// const int const_asize = 10;
#define define_asize = 10;
int array = {1,2,3,4,5,6,7,8,9,0};
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by: devdatta_clc |
last post by:
Hi C experts
I've a bunch of questions.
Consider this simplified piece of code.
const int a = 10;
int main () {
static int b = a;
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by: vishwesha.guttal |
last post by:
Hi,
I am having troble declaring a const array. If the array size is
small, then one can do as follows:
const double array = {1, 2, 3, 4, 5};
What if I have an array of size say 1000 or 10000 which, lets say, I
am reading from a data file? Then manually entering the values is
impossible. So how do I declare such a constant array?
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by: hweekuan |
last post by:
hi,
it seems i can't assign the const variable u in class A, one way to
solve the problem may be to build a copy constructor. however, why
does C++ or vector class not like this code? my g++ is: gcc version
4.0.1 (Apple Inc. build 5465). thanks for the help.
summary of compile error:
---------------------------------------
cpp.C:4: error: non-static const member 'const unsigned int A::u',
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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: 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...
|
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: 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: 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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