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by: Mantorok Redgormor |
last post by:
When is it that memset caused problems?
I recall from posts in the past where someone
used memset in their code that invoked undefined
behavior.
What about the following?
char the_array;
memset(the_array, 'A', sizeof the_array);
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by: bob_jenkins |
last post by:
{
const void *p;
(void)memset((void *)p, ' ', (size_t)10);
}
Should this call to memset() be legal? Memset is of type
void *memset(void *, unsigned char, size_t)
Also, (void *) is the generic pointer type.
My real question is, is (void *) such a generic pointer type that it
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by: 69dbb24b2db3daad932c457cccfd6 |
last post by:
Hello,
I have to initialize all elements of a very big float point array to
zero. It seems memset(a, 0, len) is faster than a simple loop. I just
want to know whether it is safe to do so, since I know it's danger to
initialize NULL pointers this way. But how about floats?
Zhang Le
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by: jacob navia |
last post by:
Many compilers check printf for errors, lcc-win32 too. But there are
other functions that would be worth to check, specially memset.
Memset is used mainly to clear a memory zone, receiving a pointer to
the start, the value (most of the time zero) and the size of the
memory array to clear.
Problems appear when the size given is not the...
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by: divya_rathore_ |
last post by:
Consider the dynamic allocation of a 2D array:
int **temp;
temp = new int*;
for (y=0; y<height; y++) temp = new int;
I have 2 Questions:
Does new initializes memory to 0?
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by: Patrick Kowalzick |
last post by:
Dear all,
I have an existing piece of code with a struct with some PODs.
struct A
{
int x;
int y;
};
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by: volunteers |
last post by:
I met a question about memset and have no idea right now. Could anybody
give a clue? Thanks
memset is sometimes used to initialize data in a constructor like the
example below. What is the benefit of initializing this way? Does it
work in this example? Does it work in general ? Is it a good idea in
general?
class A {
public:
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by: AndersWang |
last post by:
Hi,
dose anybody here explain to me why memset would be faster than a
simple loop. I doubt about it!
In an int array scenario:
int array;
for(int i=0;i<10;i++) //ten loops
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by: dykeinthebox |
last post by:
Consider the following program:
#include <stdlib.h>
#include <string.h>
int main( void )
{
void *p = malloc( 4 );
if ( p )
{
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by: Gaijinco |
last post by:
I'm having a headache using memset()
Given:
int v;
memset((void*)v, 1, sizeof(v));
Can I be 100% positive than v = 1 for i 0, or there is something
else I have to do?.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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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