I have a code snippet shown below which does not compile. I was of the understanding that Embarcadero C++ Builder XE10.1 Berlin supported the C++ 11 standard ? The initialisation of a vector gives a compile error:

[bcc32 Error] Unit1.cpp(22): E2131 Objects of type 'vector<int,allocator<int> >' cannot be initialized with { }
  Full parser context
    Unit1.cpp(20): parsing:  _fastcall TForm1::TForm1(TComponent *)

Code snippet:

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
using namespace std;

#include <algorithm>
#include <list>
#include <vector>

//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
	std::vector<int> mem = {1,2,3};
}
//---------------------------------------------------------------------------

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I am using C++03 in Visual Studio 2010 Express on Windows 10. If I were allowed to use C++11, I would just use C++11 threading model.

I found this link:
https://locklessinc.com/articles/pthreads_on_windows/
(I also found this another project: https://sourceware.org/pthreads-win32/index.html, but I'll deal with that later.)

Problem is, when I include the header from that link into my Linux pthreads program, I get lots of errors.
If you are interested in downloading it, use the above link and hit the download button on the left hand margin. Link is called "winpthreads.h".

I don't care if most of the header file is commented out. All I'd like to do is to get my old Linux pthreads program to work.

 I corrected some of them by including another header file, and declaring functions up front, so that they are known to the compiler when used in the header file. Here are the first couple of errors of many many errors:

1>c:\users\limited\documents\visual studio 2010\projects\multithreading\ode\winpthreads.h(212): error C3861: '_ReadWriteBarrier': identifier not found
1>c:\users\limited\documents\visual studio 2010\projects\multithreading\ode\winpthreads.h(218): error C3861: '_InterlockedCompareExchange': identifier not found
1>c:\users\limited\documents\visual studio 2010\projects\multithreading\ode\winpthreads.h(221): error C2440: 'initializing' : cannot convert from 'void (__cdecl *)(pthread_once_t *)' to 'void (__cdecl *)(void *)'
1>          None of the

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…

I was a C++ developer years ago but switched to C# and never looked back. But I see so so many jobs as of late which are C++ jobs.

Are these high load website projects? I know that C++ is the fastest back-end language.

What kinds of systems are mostly using C++ lately?

What kinds of technologies and frameworks are most used today with the bulk of these C++ jobs? Is this typically c++ .NET?

Thanks.

Any time that I click on the Factoring option on the main menu in a C++ builder project whilst in the code editor, the drop-down menu shows No Refactorings Available ? This is the same in RAD studio 10.2 C++ builder.
Is there a video tutorial showing how to use the Refactoring functionality or is it possible that it needs to be enabled somewhere ?
The written help on the subject just doesn't work on my PC.

I try to compile a code that was successfully compile on Linux system.  This code hast the usage of std::unique_ptr but Visual Studio nags arround the common C++ usage. The code looks like

    std::unique_ptr<bxf2::bxf> document = nullptr;
    ofstream cerr("output.txt");
    
    try
    {
        xml_schema::properties props;
        document = move(bxf2::bxf_(bxf_file, 0, props));  (Line 29)
    }

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THe error message is:

1>XSDValidator.cxx(29): error C2679: binary '=' : no operator found which takes a right-hand operand of type 'std::auto_ptr<_Ty>' (or there is no acceptable conversion)
1>          with
1>          [
1>              _Ty=bxf2::bxf
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\memory(2420): could be 'std::unique_ptr<_Ty> &std::unique_ptr<_Ty>::operator =(std::unique_ptr<_Ty> &&)'
1>          with
1>          [
1>              _Ty=bxf2::bxf []
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\memory(2449): or       'std::unique_ptr<_Ty> &std::unique_ptr<_Ty>::operator =(std::nullptr_t)'
1>          with
1>          [
1>              _Ty=bxf2::bxf []
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\memory(2520): or       'std::unique_ptr<_Ty> &std::unique_ptr<_Ty>::operator =(const std::unique_ptr<_Ty> &)'
1>          with
1>          [
1>              _Ty=bxf2::bxf []
1>          ]
1>          while trying to match the argument list '(std::unique_ptr<_Ty>, std::auto_ptr<_Ty>)'
1>          with
1>          [
1>              _Ty=bxf2::bxf []
1>          ]
1>          and
1>          [
1>              _Ty=bxf2::bxf
1>          ]

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What I have done wrong in Visual Studio? IS Visual Studio the wrong version to use?

I am working on a project where I need to convert between units.
To avoid the Mars Landing mishap, I hoping to enforce enhanced typing of primitive types.
http://articles.latimes.com/1999/oct/01/news/mn-17288

For example, not all doubles representing length are meters; some are feet, or miles.
I don't want a function expecting meters to compile if it is given a double which is in feet.

The below program compiled in VS-2010 (C++03 required), but not in ideone.com
https://www.ideone.com/YGzOCy
(There is a chance that when I copied it incorrectly from VS 2010 to ideone.com.)
In the code below I have 3 comments indicating the problem areas I have.
Could you help me fix this program to address these 3 comments?

class Hz;
class KHz;


class KHz
{
public: KHz(double val) {val_ = val;}
	operator double() const {return val_;}
	KHz operator*(double mult) {return val_ * mult;}
	
private:
	double val_;
};


class Hz
{
public:
	Hz(double val) {val_ = val;}
	
private:
	double val_;
};


// 1. Would like to avoid this explicit conversion function:
Hz cnvKHzToHz(KHz khz) {return khz * 1000.0;}


void doSomething(KHz khz) {;}


int main()
{
	Hz ret = 0;
	KHz valkhz = 4.0;
	ret = cnvKHzToHz(3.0); // 2. Would like to have a compiler ERROR to prevent argument of double
	ret = cnvKHzToHz(valkhz);
	
	// doSomething(ret); // 3. ERROR: "Cannot convert parameter 1 from 'Hz" to 'KHz'
}

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Thanks in advance.
Paul

p.s. - For more information on this topic, see:
https://www.experts-exchange.com/questions/29056989/C-03-Templatize-Type-Safety-Enforcement-Part-2.html

I have a sample application written in C++ for a slap scanner. I am able to get the image scanned but do not know what to do with the data received. Can anybody guide me in the right direction?

I have attached the SaveImage Code from the sample app(Written in C++) and would like to know how convert it to vb.net. I am novice when it comes to C++.

I have tried to read the bytes from memory starting at the pointer returned to the tagImageData structure during the scanning process.

here is the structure that contains the image data:
    <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> Public Structure tagImageData
        Public Buffer As IntPtr '< Pointer to image buffer
        Public Width As UInteger       '< Image horizontal size
        Public Height As UInteger      '< Image vertical size
        Public ResolutionX As Double  '< Horizontal image resolution (in PPI)
        Public ResolutionY As Double  '< Vertical image resolution (in PPI)
        Public FrameTime As Double    '< Image acquisition time (in seconds)
        '< This value contains the time taken for acquisition
        '< from device (excluding processing time).
        Public Pitch As Integer       '< Image line pitch (in Bytes).
        '  Positive values indicate top down line order,
        '  Negative values mean bottom up line order
        Public BitsPerPixel As Byte   '< Number of Bits per pixel
        Public Format As Integer      '< Image color format
       …

What technologies are best suited for the highest performance web services to handle the heaviest loads? Thousands (even millions) of transactions per second?

I know that Node.js can handle thousand(s) sessions on a single thread. And I do not know of any other technology which handle more than one session per thread. Am I right about that? Are there others that can do this also?

What about real-time programming as it relates to web-services. Is there such a thing?

And how about a few general words about hardware deployment? Having a central API call which distributes calls to hundreds of more specialized web servers? What about Caching for successive related calls?

And what about Machine Learning? Can algorithms be optimized by existing Machine Learning algorithms that reduce the average response times of the most heavily load web service?

Thanks.

Hello  ,

I am trying to read an hex part as given below i am hitting firs 08 with if it is ok than getting the size with 0a -> 10 it is also ok but i couldnot get into a variable .

  08 0a 59 97 a9 ef 07 29 c3 28                    

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                        if (kind == 8) {
					p++;
					uint8_t size = *p;
					p++;
					TS=(*(uint32_t *)p)
					//printk(KERN_ERR "4. TS %d ",(*(uint32_t *)p));
					p += (size-2);
				}

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Hello ,

Is there any library to trace / ping an ip or a better / faster way to get the ttl of an ip address ?

X = 1   2
       3   4

y = 3   1
       4   2
how can i convert x to y????