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by: Joseph |
last post by:
I am trying to create a function that allocates memory for the matrix
through a function; like the code below. However, this does not seem to
work since I believe that the scope of the memory allocation only lasts
within the create function. Is there anyway around this? Thanx in
advance. I also DON'T want to declare int **matrix globally.
int main(void)
{
int **matrix;
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by: Richard Hunt |
last post by:
I'm sorry for asking such a silly question, but I can't quite get my head
around malloc. Using gcc I have always programmed in a lax C/C++ hybrid
(which I suppose is actually c++). But I have started messing around in Plan
9, and that sort of thing is totally no go there :).
Is this correct to allocate memory for my struct? It works on my computer,
but I'm suspicious that I'm doing it wrong.
--
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by: Brian Blais |
last post by:
Hello,
I saw on a couple of recent posts people saying that casting the return
value of malloc is bad, like:
d=(double *) malloc(50*sizeof(double));
why is this bad? I had always thought (perhaps mistakenly) that the
purpose of a void pointer was to cast into a legitimate date type. Is
this wrong? Why, and what is considered to be correct form?
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by: Rano |
last post by:
/*
Hello,
I've got some troubles with a stupid program...
In fact, I just start with the C language and sometime
I don't understand how I really have to use malloc.
I've readden the FAQ http://www.eskimo.com/~scs/C-faq/faq.html
but it doesn't seem to answer my questions...
So, I've made an example behind, with some included questions...
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by: spasmous |
last post by:
main()
{
float * f;
initialize_f(f);
// ...use f for processing
free(f);
}
|
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by: lovecreatesbeauty |
last post by:
Hello experts,
1. Does C guarantee the data layout of the memory allocated by malloc
function on the heap. I mean, for example, if I allocate a array of 100
elements of structure, can I always reference a correct/valid structure
member upon that allocated memory?
If I allocate memory, for example like this way:
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by: James Dow Allen |
last post by:
The gcc compiler treats malloc() specially! I have no
particular question, but it might be fun to hear from
anyone who knows about gcc's special behavior.
Some may find this post interesting; some may find it
off-topic or confusing. Disclaimers at end.
The code samples are intended to be nearly minimal
demonstrations. They are *not* related to any
actual application code.
|
by: Jorge Peixoto de Morais Neto |
last post by:
I was reading the code of FFmpeg and it seems that they use malloc
just too much. The problems and dangers of malloc are widely known.
Malloc also has some overhead (although I don't know what is the
overhead of automatic variable sized arrays, I suspect it is smaller
than that of malloc), although I'm not too worried about it.
I was thinking that, with C99's variable length arrays, malloc
shouldn't be needed most of the time. But I'm...
|
by: desktop |
last post by:
I have read in Bjarne Stroustrup that using malloc and free should be
avoided in C++ because they deal with uninitialized memory and one
should instead use new and delete.
But why is that a problem? I cannot see why using malloc instead of new
does not give the same result.
|
by: somenath |
last post by:
Hi All,
I have one question regarding return value cast of malloc.
I learned that we should not cast the return value of malloc because
it is bug hider.
But my question is as mentioned bellow .
Lets say I have not included stdlib.h in my program still I am using
malloc so compiler will throw warring because with out prototype
|
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,...
|
| |
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: 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,...
|
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...
|
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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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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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