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by: chris |
last post by:
Hi all,
I need to know, what is the difference between dynamic memory
allocation, and stack allocation ?
1. If I have a class named DestinationAddress, when should I use
dynamic memory allocation to create object of that class ?
2. If it says "dynamic memory allocation", is it mean the
following code :
DestinationAddress* dest = new DestinationAddress(); // code 1
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by: Roman Hartmann |
last post by:
hello,
I do have a question regarding structs. I have a struct (profil) which
has a pointer to another struct (point). The struct profil stores the
coordinates of points.
The problem is that I don't know how many points
there will be in every struct in the end, so I have to allocate memory
dynamically for
them and can't use an array of fixed size, unfortunately.
I would like to know if there is a better way to access struct members...
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by: xian_hong2046 |
last post by:
Hello,
I think dynamic memory allocation is supposed to be used when one
doesn't know in advance how much memory to allocate until run time. An
example from Thinking in C++ is to dynamically create an array (using
"new") since one doesn't know it size when writing the program.
However, it looks to me that the size information must come from
somewhere at run time, and this information can be passed to array
creation function as a...
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by: nayannovellus |
last post by:
As per my knowledge i know that when a structure is defined, no memory is assigned to its members but when a variable of that structure is declared memory is allocated and also this allocation takes place at runtime. Now my issue is that how is dynamic memory allocation different in case of structures(when variable of that structure is declared) and classes(where memory is allocated dynamically using new operator). whats the difference it both...
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by: farshid |
last post by:
I have written a long program with c, and am using dynamic memory allocation. This program is supposed to be run over and over (300 times) for a long simulation. But the program stops after 120 cycles due to memory leackage. I am not very expert in programing but it seems that my free() function does not do anything to my program. One example of how I do memory allocation and free is this:
int *D;
D= (int *) malloc(size).
void myfunction{...
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by: Ken |
last post by:
In C programming, I want to know in what situations we should use
static memory allocation instead of dynamic memory allocation. My
understanding is that static memory allocation like using array is
faster than malloc, but dynamic memory allocation is more flexible.
Please comment... thanks.
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by: Peterwkc |
last post by:
Hello all expert, i have two program which make me desperate bu after i have noticed the forum, my future is become brightness back.
By the way, my problem is like this i the first program was compiled and run without any erros but the second program has a run time error when the function return from allocate and the ptr become NULL. How to fixed this?
Second Program:
/* Best Method to allocate memory for 2D Array because it's
...
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by: vivek |
last post by:
i have some doubts on dynamic memory allocation and stacks and heaps
where is the dynamic memory allocation used?
in function calls there are some counters like "i" in the below
function. Is this stored in stack. If yes whether it will be deleted
on exiting from the function.
is dynamic memory allocation needed for this purpose
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by: smarty |
last post by:
how can I find the memory allocated dynamically? is there any
possibility of finding it?
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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: 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: 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...
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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: 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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