| |
by: Alex |
last post by:
Is there any problem with sending function pointers through in a
variable argument list? I have a function like the following:
typedef (*ptr2FuncType1)( int );
typedef (*ptr2FuncType2)( double );
void SomeClass::DoSomething( unsigned int num_something, unsigned long
num_something_else, ptr2FuncType1 handler_one, ... )
The functions I am passing in are in a different cpp file, but they
|
by: Brian |
last post by:
Hi all,
I am implementing an object that is currently using function pointers
for callbacks to let me do something on assignment:
template <class T>
class MyClass{
private:
typedef T& (* writer) (T& oldval, T& newval);
writer onwrite;
|
by: bnoordhuis |
last post by:
Consider this:
int foo(int *a, int *b);
int (*bar)(void *, void *) = (void *)foo;
How legal - or illegal - is the typecast and are there real-world
situations where such code will cause trouble? I don't mean trouble
like in 'not compiling' but trouble like in 'crashing hard'.
|
by: Klaas Vantournhout |
last post by:
Hi all,
I'm in need of a matrix of function pointers, and to be honest. No
'nice' solution has been found yet on that big big internet.
It is possible to declare a matrix of function pointers in the following
way
void (*f)(int);
|
by: Bushido Hacks |
last post by:
A private utility function using a function pointer sounds ideal to
me. I want to simpify writing the same set of loops. While there are
a few functions that can't use it, setting and modifying values sounds
ideal.
I would like to know if the usage of this function pointer is valid
before I refactor some of the other functions that use the same data
structure to complete functions.
class Object
|
| |
by: M Turo |
last post by:
Hi,
I was wondering if anyone can help. I'm want to pre-load a 'table' of
function pointers that I can call using a its arrayed index, eg (non c
code example)
pFunc = func_A;
pFunc = func_B;
|
by: googlinggoogler |
last post by:
Hi
This should all be pretty standard C stuff, but I'm going to use terms
like mouse callback to communicate what Im tyring to do.
Basically I have my program whirling around in an infinite loop (easy)
waiting for the mouse to be clicked (I dont need help with this) and
depending on user input a variable might define what function I want
(be it line, circle....(again these are my issues)
|
by: bwaichu |
last post by:
I'm struggling with the concept of function pointers. I understand
that a function pointer contains the memory address of the function.
But I'm not sure how they are effectively used, and I'm not 100% sure
on their syntax.
This is a program I wrote to give myself an idea of how to use them.
But I'm not quite getting it. And I'm not sure what the syntax is for
a function pointer with parameters.
#include <stdio.h>
|
by: copx |
last post by:
Why doesn't the C standard include generic function pointers?
I use function pointers a lot and the lack of generic ones is not so cool.
There is a common compiler extension (supported by GCC and lccwin32 for example)
which I consider to be perfectly reasonable: you can cast every kind of function pointer
to a void pointer and void pointers to any kind of function pointer.
This follows the general "generics through void scheme" of C....
|
by: Olaf Dietrich |
last post by:
I may just be temporarily (hopefully ...) stupid, but how can
I pass a function pointer between functions using an array of
(signed/unsigned) chars (in a standard-conforming way)?
E.g.:
I have a function: int (*func)(double, int).
Now I'd like to store the "address" of this function
|
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...
|
| |
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...
|
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: 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...
|
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...
|
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();...
|
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...
|
| |
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
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...
|
8
