Re: IntelliSense and Sockets - C / C++ / MFC Discussion Boards

Re: Where do I write questions in C?

jhwurmbach7-Sep-07 2:58

jhwurmbach

7-Sep-07 2:58

You're welcome.

And please, change the title of your first mail to include "[solved]"
Thank you!

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Re: Where do I write questions in C?

gizmokaka7-Sep-07 6:23

gizmokaka

7-Sep-07 6:23

how do I do that????????

Re: Where do I write questions in C?

jhwurmbach7-Sep-07 6:24

jhwurmbach

7-Sep-07 6:24

View your post and use the 'modify' link in the lower right of it.

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Re: Where do I write questions in C?

El Corazon7-Sep-07 3:38

El Corazon

7-Sep-07 3:38

jhwurmbach wrote:
The point remains: Your struct table_rec is part of a public interface (as you are reaching inside of it).
The public interface must be completely known to be used.

true, but not necessarily completely true. You can hide part of the implimentation, though it is more complicated and generally discouraged. Providing that the sizes are the same you can swap the contents, or remap them to a full structure. There are valid reasons to do this, and invalid ones. Hiding the interface isn't the best reason in the world. I will use it to handle state based multiple meanings.

struct {
// some public code
char reserved[64];
// some public code
} data;

This you can remap with another structure 64bytes in size without difficulty. The easiest way is with two structures, one in the header, your public one, and one in the source, a private one. The problem is this is difficult to maintain. I generally will keep it in the public interface using a union to hold multiple structures in the same space, but not all programmers will do that.

this is commonly done in communication programming
struct {
int key;
// some code
} packet1;
struct {
int key;
// some code
// some more code
} packet2;

If packet1 and 2 are different sizes you can tell them apart by size. But what if they were the same size, but had say short ints packed together vs. doubles. The key tells you which packet you have, you then recast the structure to the appropriate structure and you have access to the different packet information.

_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

Re: Where do I write questions in C?

Russell^'7-Sep-07 22:58

Russell^'

7-Sep-07 22:58

Simply let your code be something like this:

file.cpp

#include "file.h"
struct{
   int tagA;
   int tagB;
};

setTagA(..){..}  //public
setTagB(..){..}  //public
getTagA(..){..}  //public
getTagB(..){..}  //public
Operation1OnStruct(..){..}  //private
Operation2OnStruct(..){..}  //private
....
OperationNOnStruct(..){..}  //private
PublicOperation1OnStruct(..){..}  //public
PublicOperation2OnStruct(..){..}  //public
PublicOperation3OnStruct(..){..}  //public

file.h

setTagA(..);
setTagB(..);
getTagA(..);
getTagB(..);
PublicOperation1OnStruct(..);
PublicOperation2OnStruct(..);
PublicOperation3OnStruct(..);

In this way the user can only use the public operations on the struct, but not the private ones because on the .h file you will put only declarations of public functions.
In file.cpp you have to define first the struct, then every function (public or private).
Important: the order!
First declare the struct and include the file.h, then define public and private functions.
the private functions on the cpp file can use each other ONLY if they calls function jet defined/declared. So the private Operation2OnStruct(..) can use Operation1OnStruct(..) but not OperationNOnStruct(..). Then if you want add some prototipes of the private function at the beginning of the file.
Rose | [Rose]

Russell

IntelliSense and Sockets

baerten6-Sep-07 21:52

baerten

6-Sep-07 21:52

Hi,

i include some headers to use sockets. The project works great, till now no problems.
Now, the IntelliSense will not work anymore.
My own classes and variables the IntelliSense shows the members and type, but
for example "accept(...);" it doesn't even know the function "accept" if i hit the F12 Key
Frown | :(

Is there a special work to do, that IntelliSense works again?

Big thanks Smile | :)

Re: IntelliSense and Sockets

Naveen6-Sep-07 23:20

Naveen

6-Sep-07 23:20

Try some third party applications like Visual Assist[^]. I cannot think of coding with out it now a days( Very useful ).

nave

[OpenedFileFinder]

Re: IntelliSense and Sockets

krmed7-Sep-07 0:48

krmed

7-Sep-07 0:48

Quite often this can be solved by closing your project, then delete the .ncb, .aps, and .clw files (they will be recreated when required).

Re-open the project and the .ncb is rebuilt and your intellisense may work again.

Good luck.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Problem about draw text

kcynic6-Sep-07 21:31

kcynic

6-Sep-07 21:31

I use CDC to draw a string in a control.
But it always draw extent to other controls,parent window,for example.
I only want to draw in its own client area.
How should I control to draw?

Thanks

GOOD LUCK