Comments by saide_a (Top 52 by date)

many thanks, I understood , I have another question , if it is possible you help me.
which part of message should be use in making signature(I am going to use SHA_1).
and does length of that(part of message in signature) matter?
for example I have source and destination id , time and sequence number in my message.

many thanks
I add (export LD_LIBRARY_PATH="/usr/local/lib/") in terminal and my problem solved

in codeblocks where can I add it

I have a packet and my packet implementation is different in my child classes
and, in my base class I used this packet too,
then I am going to define it in this way
#define FRAME_PACKET_TYPE(buff) (*((uint8_t*)&buff[0]))
thanks

actually I want that different physical size

It is so hard to explain, I am using canopen of canfestival , it is written in C and I am trying to make each node generically

I should make a fixed name function which its implementation is different for different instance( not a class instance). and the[fix name func] void(* function)(input) = &Myfucntion only work on none class method

I have edited my question please look at it

I have edited my question please look at it

I have a fixed function from a third party and I should assign to that

Many thanks , it works

Your problem isn't clear for me,
there is a fix size array (10) and in some steps of program values assign to that

I want this happen automatically after I close that tab !

I checked that but on any return value in Onclose function the destructor of class calls

I know, but I want to close the program when special tab of that close.

thanks for your giudes.
My Problem Solved, I hadn't used the parentheses in "i = geti()" line
CLASS_NAME * (geti)(void) = NULL;
CLASS_NAME * i;
void * h = dlopen("./LIBNAME.so",RTLD_NOW);
geti = (CLASS_NAME* (*)())dlsym(h, "CLASS_NAME");
i = geti();
i->Create(1);

thanks for your giudes.
My Problem Solved, I hadn't used the parentheses in "i = geti()" line
CLASS_NAME * (geti)(void) = NULL;
CLASS_NAME * i;
void * h = dlopen("./LIBNAME.so",RTLD_NOW);
geti = (CLASS_NAME* (*)())dlsym(h, "CLASS_NAME");
i = geti();
i->Create(1);

using this command I got the return object function
nm -D LIB.so
but now after getting the object that has none null value
on each function call I am getting segmentation fault.
could you please help me?

using this command I got the return object function
nm -D LIB.so
but now after get the object that has none null value
on each function call I am getting segmentation fault.
could you please help me?

if all header functions be pure virtual , can I use static linking?

it works , but because all member functions in header are pure virtual , it makes another problem.
this error
cannot allocate an object of abstract type ‘Class_Name’
calss_name.h:note: because the following virtual functions are pure within ‘class_name’:(all member function)

I think I force to use dynamic linking

No , it haven't function for returning instance :(

could you help me for link my app to library?, in above I put my using command.

many thanks for your response,
I used the command in this way also
g++ -o testcan testcan.cpp -L/lib path -lLIBNAME.so
but I got this error :/usr/bin/ld: cannot find -lLIBNAME.so
I added the library path in this way :
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/MyFirstProjects/
but I still get the same error

I get segmentation fault error even if i is not Null

for compile I use this command in linux terminal:
g++ -o test test.cpp -ldl
is there something wrong?

what I tried in your suggested query:
Select D.[ID],D.[UID],D.[Code],D.[Time] From MsgTable D
INNER JOIN
(select MsgTable.ID, MAX(MsgTable.Time) from MsgTable group by MsgTable.ID) G
On D.Time = G.Time AND D.ID = G.ID
Order By D.[ID],D.[Time]
and the error
No column was specified for column 2 of 'G'.

what does 'MyTable a' mean? and also B in second line?
I want to get answer from this query
Select D.[ID],D.[UID],D.[Code],D.[Time] From MsgTable AS D
INNER JOIN
(select MsgTable.ID, MAX(MsgTable.Time) from MsgTable group by MsgTable.ID) As G
On D.Time = G.Time AND D.ID = G.ID
Order By D.[ID],D.[Time]

its not work for me

Many thanks ,I used virtual list as described in this link https://www.codeproject.com/Articles/7891/Using-virtual-lists

it's list of 8 byte messages in 4 MB memory.

In My Case almost always complete scrolling is needed, only at the "open" click I want the list to update an show, and in other thread nothing related to the listctrl. what do you suggest for me?

if you assume these as a game:
finding eulerian path or Dijkstra algorithm,
Bunny Graduation in this link
http://www.cplusplus.com/forum/beginner/92473/
I enjoyed them.

I don't know I got your problem properly or no!
but you can always check bytesrecvd value for check existence of data, in these way you can have multiple clients and if one of them stop sending data, you can have other client data but in what you said, after stopping one of the clients, server won't answer others. Then in your server your can have closing flag or bottom for ending program

I think you can't do that in bank_account class you need another class or another function that get bank_account as input object and add or withdraw value of that.

Many Thanks

the C2061 syntax error: identifier 'int_'

I found a source which in for serialization with c++11 when I compile it produce this error.
part of code that get error:
template <class tuple_type, size_t pos>
inline size_t get_tuple_size(const tuple_type& obj, int_<pos>)
{
constexpr size_t idx = std::tuple_size<tuple_type>::value - pos - 1;
size_t acc = get_size(std::get<idx>(obj));
return acc + get_tuple_size(obj, int_<pos - 1>());
}

I want it without using boost

As OriginalGriff said I think, the solution is use of threading (pthread).

Thanks for your answer, I think so too.
I will try more and if I find a solution I post it here.

I am sure that client packet sends and at the same time in echo server I get socket receive time out error, I don't have lost but few of packets delayed.
My code is event dirven