overloading the iostream operators ( >> and <<) - C / C++ / MFC Discussion Boards

gamitech1-Jun-04 23:42

1-Jun-04 23:42

can someone please tell me a way to gwet the IP of the localhost. A function or a way to receive it in a buffer.
I certainly hope you can help me.
And how can I get the ip of a computer in the localnetwork because in most cases you getr the ip of the Net provider of that whole local network.
Please adive at least with a function for the localhost.
Thank you

gabby

Re: How to get Ip

Nirav Doshi1-Jun-04 23:54

Nirav Doshi

1-Jun-04 23:54

Check the NetWkstaGetInfo() from the Platform SDK! If this is not quite helpful, you may consider another API from the networking API in the PSDK!

* Don't wish it was easier, wish you were better! *

Re: How to get Ip

gamitech1-Jun-04 23:58

gamitech

1-Jun-04 23:58

I wish I were better really I am really trying to get there
Thank you for the help

gabby

Re: How to get Ip

Antony M Kancidrowski1-Jun-04 23:57

Antony M Kancidrowski

1-Jun-04 23:57

You can get a list of the interfaces in which you can get the IP address

WORD		versionRequested;
int		wsError;
WSADATA		winsockData; 
SOCKET		s;
DWORD		bytesReturned;
char*		pAddrString;
SOCKADDR_IN*	pAddrInet;
u_long		SetFlags;
INTERFACE_INFO	localAddr[10];  // Assume no more than 10 IP interfaces 
int		numLocalAddr; 

versionRequested = MAKEWORD(2, 2);

wsError = WSAStartup(versionRequested, &winsockData); 

if (wsError)
  return;

if ((s = WSASocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, 0, 0)) == INVALID_SOCKET)
{
  WSACleanup();
  return;
}

// Enumerate all IP interfaces
wsError = WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, &localAddr, sizeof(localAddr), &bytesReturned, NULL, NULL);

if (wsError == SOCKET_ERROR)
{
  closesocket(s);
  WSACleanup();

  return;
}

closesocket(s);

// Display interface information
numLocalAddr = (bytesReturned / sizeof(INTERFACE_INFO));

for (int i = 0; i < numLocalAddr; i++) 
{
  // Loop through all interfaces and get the IP address
}

WSACleanup();

Hope that helps.

Ant.

Re: How to get Ip

gamitech2-Jun-04 0:01

gamitech

2-Jun-04 0:01

thanks dude Smile | :)

that's cool

gabby

Re: How to get Ip

gamitech2-Jun-04 0:02

gamitech

2-Jun-04 0:02

thanks dude

gabby

Re: How to get Ip

David Crow2-Jun-04 3:28

David Crow

2-Jun-04 3:28

euacela wrote:
can someone please tell me a way to gwet the IP of the localhost.

Call gethostname() followed by gethostbyname().

euacela wrote:
And how can I get the ip of a computer in the localnetwork...

Use gethostbyname() for this, too.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

overloading the iostream operators ( >> and <<)

kaspasewe1-Jun-04 23:09

kaspasewe

1-Jun-04 23:09

i've tried overloading the operator >> and <<... but the compiler keeps complaining that i cant acess private data. this is after using a friend fuction. all other friend fuctions can acess private data except these two function. i am currently using VC++ 6.0 can anybody tell me whats the problem.
hre is an example of the code
//point class
class mypoints
{
private:
int x;
int y;
public:
//constructors
friend istream& operator >> (istream& s, mypoint& p);
friend ostream& operator << (ostream& s, mypoint& p);
};
//////////////////////////////////////////////
//function defination
istream& operator >> (istream& s, mypoint& p) {
cout<<"enter the x value : ";s>>p.x;
cout<<"enter the y value : ";s>>p.y;
return s;
}
what could be the problem
help !!!!

THE STUDENT

Re: overloading the iostream operators ( >> and <<)

gamitech1-Jun-04 23:52

gamitech

1-Jun-04 23:52

what is the exactly the error. probably the compiler has a conflict with the dynamic linked library that VC++ is using or the static library. What is the goal of your program ?. Give me the lib files you are using and a bigger part of your code.
I could help you find another way

gabby

Re: overloading the iostream operators ( >> and <<)

kaspasewe4-Jun-04 0:08

kaspasewe

4-Jun-04 0:08

i think its a compiler problem because all the other friends function can access the private member data execept the one with the stream objects. so how do you fix the compiler conflict.
i have tried reinstalling VC++ and include its components but its still giving me the same messsage " ..... cannot access private member... see declaration of the the variable "

changin rezolution in a Win32 APP

gamitech1-Jun-04 23:09

gamitech

1-Jun-04 23:09

Can someone please tell me how can I change the resolution of the scren in a win32 application. Hope you don't have to import functions from the Microsoft DX. Something as simple as you can.

gabby

Re: changin rezolution in a Win32 APP

Frank K2-Jun-04 0:34

Frank K

2-Jun-04 0:34

Hi,

try
ChangeDisplaySettings(...), or
ChangeDisplaySettingsEx(...)

MSDN: device context functions[^]

HTH
Frank

Re: changin rezolution in a Win32 APP

gamitech2-Jun-04 0:55

gamitech

2-Jun-04 0:55

thank you very much
This will help me a lot

gabby

howto Determine encoding of a text file

ananttrivedi1-Jun-04 22:55

ananttrivedi

1-Jun-04 22:55

how can I determine, using C++ or Win32 api which encoding is a Text file written in ?
I have a text file in either unicode or utf8 or ascii and I need to determine which encoding the file is written in. the solution about checking the BOM to verify the encoding dosnt work as not all text files have a BOM associated. eg: vrmlutf8 encoded files normally have a missing BOM.

Re: howto Determine encoding of a text file

RChin1-Jun-04 23:33

RChin

1-Jun-04 23:33

You can use the IsTextUnicode() API function to test your file. It uses an array of test, including statistical and/or BOM to see if your file is UNICODE or not. It is not full proof, but I haven't had any problems with its results so far.

MSDN Link[^]

I Dream of Absolute Zero

CRectTracker problem?

raed1-Jun-04 22:39

raed

1-Jun-04 22:39

Hello:
Could anyone provide me with information in how to move multiple rectangles in screen by mouse using CRectTracker.

I recently build application that draws rectangles by mouse,
and i can select rectangles one at atime and also select multiple shapes ,and move/resize one shape at same time.
my problem in moving multiple shape using CRectTracker.
i read many example like DRAWCLI in MFC sample, but it didnt using CRectTracker.

Thanks

Using latest SDK with Visual C++ 6.0

Anonymous1-Jun-04 22:37

Anonymous

1-Jun-04 22:37

I have some code I want to compile. I have installed Visual C++ 6.0 but I get a build error:

error C2065: 'INTERNET_CONNECTION_OFFLINE' : undeclared identifier

I understand I need to use a later SDK so I have downloaded the very latest one and installed it but my problem is not solved. I think I must now direct Visual C++ to the SDK directories instead of the old ones. Is this correct? How must I do it?

Re: Using latest SDK with Visual C++ 6.0

Nirav Doshi1-Jun-04 23:09

Nirav Doshi

1-Jun-04 23:09

It could be because you've not included <WinInet.h>>in the right place (maybe!)

Anonymous wrote:
I understand I need to use a later SDK so I have downloaded the very latest one and installed it

I suppose you are speaking about the Platform SDK here... If you have the latest, you need to move them up in the directories listing for include files & library files in the Project settings dialog box.

Re: Using latest SDK with Visual C++ 6.0

thowra1-Jun-04 23:31

thowra

1-Jun-04 23:31

MSDN: Installing the Platform SDK with Visual Studio[^]

"Oh, I'm sick of doing Japanese stuff! In jail we had to be in this dumb kabuki play about the 47 Ronin, and I wanted to be Oshi, but they made me Ori!"

Displaying line number in MS VC++ 6.0

ron4ld1-Jun-04 22:03

ron4ld

1-Jun-04 22:03

Hello everyone,

Just a simple question,

how to display line number in
the Microsoft Visual C++ version 6.0?

thanks
Ronald
Confused | :confused:

Re: Displaying line number in MS VC++ 6.0

Nirav Doshi1-Jun-04 23:14

Nirav Doshi

1-Jun-04 23:14

There is no way in MSDEV, the IDE we use for VC++ 6.0 development - to display line numbers.

Alternatively there may be some plug-in written to extend the MSDEV environment, but I've not yet come across any yet.

Re: Displaying line number in MS VC++ 6.0

ron4ld1-Jun-04 23:38

ron4ld

1-Jun-04 23:38

Whattt?!?
Such a complex IDE and there's no way
to display the line number??

What a horrendous crime!
[sorry just joking Smile | :)

]

arrgggghhhh!!!!

Ronald

Re: Displaying line number in MS VC++ 6.0

RChin2-Jun-04 0:32

RChin

2-Jun-04 0:32

ron4ld wrote:
What a horrendous crime!

I agree. Thankfully this was sorted in VS7, as well as improving the printing capabilities as well.

I Dream of Absolute Zero

Re: Displaying line number in MS VC++ 6.0

si_692-Jun-04 2:05

si_69

2-Jun-04 2:05

RChin wrote:
Thankfully this was sorted in VS7

do you know where it is in vs7 ???

Re: Displaying line number in MS VC++ 6.0

RChin2-Jun-04 2:31

RChin

2-Jun-04 2:31

Line numbering can be enabled in VS7 / 7.1 from the options dialog->Text Editor.

I Dream of Absolute Zero

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