|
by: Tran Tuan Anh |
last post by:
Dear all,
I am new in C++, and now get confused about a lot of things.
I wrote this simple code to test the vector.
class Temp { public: int x; };
int main() {
vector<Temp> v;
|
by: luigi |
last post by:
Hi,
I am trying to speed up the perfomance of stl vector by
allocating/deallocating blocks of memory manually. one version of the
code crashes when I try to free the memory. The other version seem to
work. I would appreciate someone to comment on this.
Version 1 (crashes on deallocating)
#include <iostream>
|
by: BCC |
last post by:
If I create a vector of vectors of double:
std::vector< std::vector<double> > table1;
Are my vectors of doubles uninitialized? Do I have to loop through table1
and initialize each vector of doubles using new?
And in cleaning up, manually delete each of these vectors of doubles?
Thanks,
|
by: Mona |
last post by:
class myPoly
{
private:
int nv;
double *x, *y;
int *p;
public:
myPoly()
{
|
by: Alfonso Morra |
last post by:
I have the ff code for testing the concept of storing objects:
#include <vector>
#include <iostream>
using namespace std ;
class MyClass {
public:
MyClass(){
|
|
by: Richard |
last post by:
vector<char*> m_Text;
m_Text.resize(1);
char* foo = "FOO";
char* bar = "BAR";
char* foobar = (char*)malloc(strlen(foo) + strlen(bar) + 1);
if (foobar)
{
strcpy(foobar, foo);
strcat(foobar, bar);
}
|
by: Jef Driesen |
last post by:
I'm working on a project where i need to exchange multidimensional data
between C/C++ (row-major) and matlab (column-major). I understand the
difference between those two mappings to linear memory.
Suppose I need an S1 x S2 x ... x Sn dimensional array A. I can have the
same layout in memory by reversing the dimensions:
A... == A(Sn,...,S1)
where I used the C/C++ notation for row-major and the matlab notation
|
by: smp |
last post by:
Does anyone know why making a vector of pointers is so much less efficient
than a vector of objects? For a simple example:
int num = 20;
vector<int*v_int_ptr;
v_int_ptr.reserve(num);
for(int i = 0; i < num; i++)
{
int* my_int_ptr = new int;
|
by: cham |
last post by:
Hi,
I am working on c++ in a linux system ( Fedora core 4 ),
kernel version - 2.6.11-1.1369_FC4
gcc version - 4.0.0 20050519 ( Red Hat 4.0.0-8 )
In my code i am creating a vector to store pointers of type structure
"SAMPLE_TABLE_STRUCT" ( size of this structure is 36 bytes ). I create
an instance of structure "SAMPLE_TABLE_STRUCT" using operator "new"
and push back into the vector,this is done inside a for loop for
|
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: 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: 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: 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?
|
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|