Knowing the connected client - C / C++ / MFC Discussion Boards

Re: static variables in MFC

David Crow4-Apr-07 3:32

David Crow

4-Apr-07 3:32

iayd wrote:
Because when I declared as public it gave linking errors.

Was it declared in a .h or a .cpp file?

iayd wrote:
When I declared as "private static int x"...

But did you also define it?

iayd wrote:
...again it gave linking errors(error LNK2019...

It might help to specifiy that you are using VS2003 or VS2005.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: static variables in MFC

Eytukan4-Apr-07 3:33

Eytukan

4-Apr-07 3:33

It's not a problem with public or private. You need to define the static variable again in the implementation file (.cpp)

Eg:
yourclass.h:

class yourclass
{
static bool test;
}

yourclass.cpp

bool youclass::test;

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

Re: static variables in MFC

David Crow4-Apr-07 3:45

David Crow

4-Apr-07 3:45

VuNic wrote:
You need to declare the static variable again...

Technically, that's called defining.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: static variables in MFC

Eytukan4-Apr-07 3:54

Eytukan

4-Apr-07 3:54

OOPs!

Press: 1500 to 2,200 messages in just 6 days? How's that possible sir?
Dr.Brad :Well,I just replied to everything Graus did and then argued with Negus for a bit.

Re: static variables in MFC

iayd4-Apr-07 4:23

iayd

4-Apr-07 4:23

Thanks
you are right Smile | :)

How to find if a remote system is logged in?

ShaluMalu4-Apr-07 2:47

ShaluMalu

4-Apr-07 2:47

Dear friends, i am currently working on a module which lists the IP address of all the active systems in a LAN. The process continuously runs and updates the IP addresses(in case logged in or log out). I have used timer to update it. Now i need to check if a remote system is logged in or not. So if you know please do tell me what should be done to check if a remote system is logged in.

Thank you(in anticipation)

Shalumalu

Re: How to find if a remote system is logged in?

David Crow4-Apr-07 3:12

David Crow

4-Apr-07 3:12

ShaluMalu wrote:
So if you know please do tell me what should be done to check if a remote system is logged in.

Is NetServerEnum() of any help?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Knowing the connected client

_80864-Apr-07 2:44

_8086

4-Apr-07 2:44

client=accept(serv,(struct sockaddr*)&frm,&frmlen);

This line gets the client that connects from a remote machine.
Now how do we know from which machine did that connect? How do we get the machine name or IP address. Is there any function that gets in the SOCKET as input and returns IP address or Name?

----------------------------
286? WOWW! Blush | :O

Re: Knowing the connected client

David Crow4-Apr-07 3:09

David Crow

4-Apr-07 3:09

_8086 wrote:
Now how do we know from which machine did that connect?

client = accept(serv, (struct sockaddr *) &frm, &frmlen);
char *clienthost = inet_ntoa(frm.sin_addr);
int port = ntohs(frm.sin_port);

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Knowing the connected client

_80864-Apr-07 20:43

_8086

4-Apr-07 20:43

Thanks David.

----------------------------
286? WOWW! Blush | :O

How to convert CString str = "ABCD"; to int i = ABCD;

Amyvad4-Apr-07 2:42

Amyvad

4-Apr-07 2:42

Hello All,

I read strings from file and want to convert that String to int (enum value)
Example:

CString str = "ABCD";

I want output to be:
int i = ABCD;

Is it a valid conversion?? Can it be done? If yes, could you please provide me an example?

Thanks.

Re: How to convert CString str = "ABCD"; to int i = ABCD;

toxcct4-Apr-07 2:48

toxcct

4-Apr-07 2:48

are you serious ??? Unsure | :~

since when ABCD is an integer ?

unless you have an hexadecimal value maybe ?

please explain your question more, because it is not clear enough to get valuable help

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Re: How to convert CString str = "ABCD"; to int i = ABCD;

Amyvad4-Apr-07 2:53

Amyvad

4-Apr-07 2:53

when I read the file, i get CString token returns "ABCD" with myfile.NextArgument()
I want to convert that CString token to enum value ABCD.

Re: How to convert CString str = "ABCD"; to int i = ABCD;

toxcct4-Apr-07 2:57

toxcct

4-Apr-07 2:57

can you show the definition of your enum please ?
also, show some lines of the file you read

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Re: How to convert CString str = "ABCD"; to int i = ABCD;

Amyvad4-Apr-07 3:06

Amyvad

4-Apr-07 3:06

typedef enum PROP_VALUES
{
PROPULSION,
ENGINES,
MOTORS
DIESEL
};

struct ENG_Data
{
CString name;
int eng_num;
PROP_VALUES mode;
};

ENG_Data eng[10];

File has entries like the following:
CTRL: 1, Vehicle, 23456, PROPULSION
CTRL: 2, Bikes, 12222, MOTORS
etc.

myfile.OpenTextFile(m_File);
while (myfile.GetNextCommandLine())
{
cmd= myfile.Command();
if (cmd== "CTRL")
{
int i = atoi(myfile.NextArgument());
eng[i].name = (myfile.NextArgument());
eng[i].eng_num = atoi(myfile.NextArgument());
eng[i].mode = (myfile.NextArgument())); <-------- This is one I want to convert to integer(enum value)
}
myfile.CloseTextFile(m_File);

Re: How to convert CString str = "ABCD"; to int i = ABCD;

toxcct4-Apr-07 3:17

toxcct

4-Apr-07 3:17

Maximilien gave you the right answer. you cannot do like you asked. you must check using a if/else if series

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Re: How to convert CString str = "ABCD"; to int i = ABCD;

Amyvad4-Apr-07 3:18

Amyvad

4-Apr-07 3:18

Thanks for your comments.

Re: How to convert CString str = "ABCD"; to int i = ABCD;

Try4-Apr-07 2:52

Try

4-Apr-07 2:52

If str is something like
str = "111";
then try
_atoi() or _ttoi()

Re: How to convert CString str = "ABCD"; to int i = ABCD;

Maximilien4-Apr-07 3:06

Maximilien

4-Apr-07 3:06

if I understand correctly, you have this in your code :

typedef enum {
  ABCD = 0,
  EFGH
} SomeEnum;

and when reading a file with the string "ABCD" you want to "map" that string to the corresponding enum value ?

you can do something like :

char* s;// allocated and assigned somewhere else to "ABCD"
SomeEnum myEnum;
if ( strcmp( s, "ABCD") == 0 )
{
 myEnum = ABCD;
}
else if ( strcmp( s, "EFGH") == 0 )
{
 myEnum = EFGH;
}
else ...

but, IMO, if can store numbers (the real enum value) instead of a string, then you will only have to load the int and ( maybe) cast it to the enum type.

M.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: How to convert CString str = "ABCD"; to int i = ABCD;

Amyvad4-Apr-07 3:19

Amyvad

4-Apr-07 3:19

Thanks for your comments

Problem in CFileopenDialog

Murugan k4-Apr-07 2:11

Murugan k

4-Apr-07 2:11

Hi,
I have done report genaration project in vc++.

I have show some data on the window from database and save that data into file. I just found out that it only crashes when the files are on the desktop.That is when i try to open the file on desktop using CFileOpendialog, my application going to closed.But application work properly in my PC.

Re: Problem in CFileopenDialog

toxcct4-Apr-07 2:13

toxcct

4-Apr-07 2:13

do you really need to repost half an hour after ? Frown | :(

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Re: Problem in CFileopenDialog

David Crow4-Apr-07 3:14

David Crow

4-Apr-07 3:14

Come on, tox. He waited 33 whole minutes for a response. If you can't help him within that amount of time, we're gonna have to consider cutting your pay.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Problem in CFileopenDialog

toxcct4-Apr-07 3:37

toxcct

4-Apr-07 3:37

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Problem in CFileOpenDialog

Murugan k4-Apr-07 1:38

Murugan k

4-Apr-07 1:38

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.