Help in sending the table no, Item, special orders, quantity

well, maybe it's "m_sendmsg" instead... ?

regards

For the other experts : this is a question regarding http://www.experts-exchange.com/Programming/Q_21520442.html

For int_acct :

check the function documentation :

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_wcstombs.asp

It will explain you how to use it, even with an example.

m_sendmsg should be defined as a wchar_t*

The error plainly states, in the first instance, that wcstombs does not take 4 parameters.  That is correct; wcstombs expects ONLY 3 parameters.  I'm wondering why it thinks there are 4 parameters specified when I only see 3 in the code.  In the latter example where 6 parameters are specified the error is, at least, more obvious.  Seems to me, just guessing, with regard to the first example provided that the problem is either syntax or an error with regard to expected argument 'type'.

as i said, int_acct, please check this link :

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_wcstombs.asp

It explains what the function does, and how you should use it.

Either this is not the function you want, or you're using it incorrectly.

Either treat them seperately, or put all data in the same array, and then convert that array with that function (at the receiving end, you'll have to convert it back to the original array then, and split the array to its original parts).


Afaik, there's no function that takes multiple parameters of that type.

The call

>> m_psock->Send(buffer, len);

expects buffer to be a character array. So, you'll have to convert your data to a character array in order to send it. How you do that is totally up to you. A character array is the most general format you can have to send data over a network. You can put anything you want in it. It all depends in what format you have it before sending, and in what format you want it after receiving.

It will have to be converted to a byte array, no matter how you turn it :)

To pack your data in 1 byte array, you'll have to devise a simple encoding/decoding protocol to encode the data into a byte array, and decode the byte array to the data. This doesn't have to be difficult.

For example, you can take 4 bytes for each integer, and a null terminated character array for the CString's.

---- example of the last ----
if you want to send this :

Table No. : 35
Items : spaghetti
qty : 2
Special orders : none

then your general encoded byte array would look like :

|<-- 4-bytes(tableno) -->|<-- null-terminated(items) -->|<-- 4-bytes(qty) -->|<-- null-terminated(special) -->|

or with the data in it (conceptual) :

|<-- 35 -->|<-- "spaghetti" -->|<-- 2 -->|<-- "none" -->|

now :

35 encoded in 4 bytes : 0x00000023
"spaghetti" (using ASCII values and terminated by a null) : 0x73706167686574746900
2 encoded in 4 bytes : 0x00000002
"none" (using ASCII values and terminated by a null) : 0x6e6f6e6500

and finally the actual byte string (concatenation of the previous 4) :

0x0000002373706167686574746900000000026e6f6e6500

which is 23 bytes long.

When you receive that byte string on the server, you can easily decode it by :

1) taking the first 4 bytes (0x00000023) and converting it back to 35
2) taking the next series of bytes untill you get a null (0x73706167686574746900) and get "spaghetti"
3) taking the first 4 bytes (0x00000002) and converting it back to 2
4) taking the next series of bytes untill you get a null (0x6e6f6e6500) and get "none"

Voila :)
---- end example ----

Of course this is just an example, and you might want to do it a bit differently :)

The part you showed in your first message : where you're sending the message. Just put everything you want to send in ONE byte array (char[]) and send it to the server. On the server side, where you receive the message, you simply extract the daat from the received byte array, and there you go ...

I've already asked you in the other thread what the 59 is doing there ...