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It's getting embarrassing watching you utilize documentation so frequently 
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following code is correct.
class MyInt
{
public:
int i0;
int i1;
int i2;
};
<br>
<br>
MyInt myData[]=
{
{1, 0, 2},
{5,},
{4,},
};
I hope default value of i1=100 and i2=200;
So I add construct to class MyInt:
class MyInt
{
public:
MyInt()
{
i1=100;
i2=200;
}
int i0;
int i1;
int i2;
};
<br>
<br>
MyInt myData[]=
{
{1, 0, 2},
{5,},
{4,},
};
This time, I got a compile error:
error C2440: 'initializing' : cannot convert from 'const int' to 'class MyInt'
which points to //error line.
The error looks like syntax error, how to solve the problem and set i1 and i2 to default values?
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Strange, I'm not finding errors
have you tryed this constructor way?
MyInt()
: i1(100)
, i2(200)
, i3(0)
{
}
-- modified at 9:51 Monday 10th September, 2007
At the same time I'm not so sure that you can define a constructor and initialize the elements of the class as it is a struct. This sintax is forcing a little the flexibility of the C++ language. I mean that this time probally it is better if you spend some time writing ALL the initialization by hand.
Russell
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You can't use the array initializer syntax on a struct that has a ctor. Do this instead:
MyInt myData[]=
{
MyInt(1,0,2),
MyInt(5),
MyInt(4)
};And what's with all those extra commas?
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Hello friends,
I am working on a project in which It is sending the packet on the Internet server at the interval of 3 sec. The packet is roughly of 1KB(kilo Bytes) size. And when I check the programme in the Taskbar it show the CPU Usage to 50%.
The project is a simple Dialog based WIN32 application. And it uses SOCKET and Timer to send and receive the data from Internet Server.
Is there any way I can reduce the memory usage.
Or please tell me what are the possible flaws that can lead to this type of proble.
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Hi,
when you poll for new data, you have seriously a loop (while(!Stop) or something like this)
you should use a Sleep(10) or Sleep(100) into this loop, otherwise this thread is working nonstop.
Good luck
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Thanx,
NOW I am using the Sleep(); in my function. and all working fine.
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If the absence of Sleep() causes your program to not work, that usually indicates a design flaw.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Whatever works for you, I guess, but most would say that's a really bad design.
You're wasting CPU resources in a loop for something that can be made completely event
driven and work VERY efficiently.
By the way, if you're using a SOCKET and a timer, how is it possible that you're using any
noticeable CPU?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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I've learned much from this article. But now I got some problem.
How to get client's IP address when it act as a server?
Thanks in advance.
----------
C++ Learner
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Hi,
i made it this way :
SOCKADDR_IN ClientAddress;
int adrlen = sizeof(ClientAddress);
accept(ListenSocket,(LPSOCKADDR)&ClientAddress,&adrlen);
then you get the String of the Client's IP Adresse this way:
inet_ntoa(ClientAddress.sin_addr)
I hope this helps you 
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Thanks for your assistance.
I added those lines to my project.
But, when I build the project, there was an error :
error C2065: 'ListenSocket' : undeclared identifier
So I added this line :
SOCKET ListenSocket;
Then I build it again, although I got some warning :
warning C4700: uninitialized local variable 'ListenSocket' used
there was no error.
Then I debug, try to connect from other computer.
It was connected, could read the buffer, but my program shows "0.0.0.0" as client's IP address.
Any suggestion?
----------
C++ Learner
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Ok,
so you have used the CodeProject offered classes "Java-like-Sockets" without
knowing how it works.
The ListenSocket is a part of the source code that you need to etablish a connection.
You need to look into the SourceCode of the "Java-like-Sockets" Classes and check where
the accept(...) is performed. There you can add the line inet_ntoa(...); to get the Clients-IP-Address
If you have questions: i'll look here 
Good luck
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In sock.cpp you have the following lines :
SOCKET theClient;
SOCKADDR_IN clientAddr;
int ssz = sizeof(struct sockaddr);
theClient = accept(m_socket,(LPSOCKADDR)&clientAddr,&ssz);
if (theClient == INVALID_SOCKET) {
int nret = WSAGetLastError();
throw CSocketException(nret, "Invalid client socket: Accept()");
}
CSocket *sockClient = new CSocket();
sockClient->SetSocket(theClient);
sockClient->SetClientAddr(clientAddr);
m_socket is the socket which listens on the given Port. So m_socket is a ListenSocket
theClient is also a Socket which will store an Incomming-Connection from a Client.
clientAddr is a structure which will be filled with information during the accept()-function.
After accept was executing, you have the IP and Port into this strucure.
At the end you see that clientAddr is stored inside the class, so you can access from out
your source code, to the CServerSocket class and get the Client-Information-Structure.
You get the IP in plain text with
char TheClientIP[16]="";
strcpy(TheClientIP,inet_ntoa(...->sin_addr));
Good luck
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Your response is always so fast.
I really appreciated your explanation about the source.
It's really easy to understand.
I think I got what it mean now.
But still doesn't know what is inside (...->sin_addr).
because m_clientAddr is an private object,
so I can't access it.
----------
C++ Learner
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I solved it, thanks to your assistance.
Your answers really help me.
In main function, I added these lines :
CSocketAddress *addrs = sock->GetAddress();
ClientAddress = addrs->GetSockAddrIn();
buffer2 = inet_ntoa(ClientAddress.sin_addr);
Thanks again for your assistance.
-- modified at 12:15 Monday 10th September, 2007
----------
C++ Learner
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Correct!
No problem for helping, i very glad that the hole CodeProject-Crew helps me with my problems LOL
Without the help of some guys here, i would be no more at my job 
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Hi all,
Actually i want to write a html file or .html page and i don't know how to do it using MFC. I know how to write a .txt file using CStdioFile class and using WriteString API's. Can any body tell me how to do it.
Thanks in advance
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1. You must know the HTML tags.
2. While saving the file just specify the extension as .htm / .html.
And you are done with writing an .html file.
Regards,
Paresh.
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Hi all
I ahev problem, I have code:
<br />
HANDLE hSearch = INVALID_HANDLE_VALUE; <br />
WIN32_FIND_DATA FileData; <br />
<br />
<br />
if(hSearch == INVALID_HANDLE_VALUE) <br />
hSearch = FindFirstFile("C:\\Myfolder\\Fi*",&FileData);
else<br />
FindNextFileA(Search,&FileData);<br />
<br />
when program go to "problem point" I get error message: NTDLL.dll
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david bagaturia wrote: when program go to "problem point" I get error message: NTDLL.dll
NTDLL.dll ? That's a very descriptive error message 
If you want some help, you have to provide at least some bit of usefull information. So, what happens exactly ? What does this message say exactly ?
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I get this error: unhandled exception in cpy_file.exe (KERNEL32.dll):
0xE06D7363: Microsoft C++ Exception.
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Use your debugger to inspect the variables and see exactly what happens.
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