Re: Could please anybody help me with writing a simple program - Managed C++/CLI Discussion Boards

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Re: Help

El'Cachubrey9-Apr-07 21:49

El'Cachubrey

9-Apr-07 21:49

THANK

C++ connection

p_8-Apr-07 20:04

8-Apr-07 20:04

hi to all of u Rose | [Rose]

i have a problem in connection with c++ and sql
so please can anybody tell me the code to connect c++ with sql
please i need it so help me in this regard

thanks in advance
Rose | [Rose]

Re: C++ connection

Jun Du9-Apr-07 3:00

Jun Du

9-Apr-07 3:00

Please post your question to "SQL/ADO/ADO.NET" forum.

Best,
Jun

Is delete useful ?

aljodav8-Apr-07 18:43

aljodav

8-Apr-07 18:43

In a very long loop (up to 500.000), I have a String^ variable that takes long lengths (and different values) each loop cycle. I wonder if it's worthy to delete the variable at each loop cycle's end; if delete is not used, will the CLR take care of it ?

Re: Is delete useful ?

Nish Nishant9-Apr-07 3:20

Nish Nishant

9-Apr-07 3:20

String is not IDisposable, so there's no point in calling delete. For another thing, you don't need to do that anyway, the GC will appropriately come into play as and when required.

Regards,
Nish

Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
C++/CLI in Action (*E-Book is out, Print version April 6th*)

Fly on your way like an eagle
Fly as high as the sun
On your wings like an eagle
Fly and touch the sun

Re: Is delete useful ?

aljodav9-Apr-07 18:34

aljodav

9-Apr-07 18:34

Thanks Nish. Cool | :cool:

Could please anybody help me with writing a simple program

Khodadad Pakdamans8-Apr-07 8:28

Khodadad Pakdamans

8-Apr-07 8:28

if you are able to write this program please help me:

YOU KNOW THAT THE ISDN NUMBER IS A SPECIFIC NUMBER FOR EACH BOOK,AND FOR EXAMPLE AN ISDN NUMBER LIKE 964-92032-1-4 CONTAINS THIS INFORMATION:

ISDN : TheLanguageOfTheBook-PublisherCode-BookNumber-CheckDigit

the check digit number is calculated in this way,
for example for 964-92032-1-4 :

10x9 + 9x6 + 8x4 + 7x9 + 6x2 + 5x0 + 4x3 + 3x2 + 2x1 = 271
271%11=7 = Result
then the CheckDigit number should be (11-Result)
ok?

Here's the interface of the program:

Enter ISBN: 964-92032-1-4
Language: 964
Publisher: 92032
Book number: 1
Check digit: 4
This ISBN code “964-92032-1-4” is valid!
or
This ISBN code “964-92032-1-4” is invalid!

Please let me know if you understood the program well!thanks again,sorry for the english mistakes found in my text,i'm really sorry!

Khodadad Pakdaman
Pakdaman@CleanMail.it

Re: Could please anybody help me with writing a simple program

Nish Nishant8-Apr-07 13:02

Nish Nishant

8-Apr-07 13:02

You have to first decide why you need to use C++/CLI to write this program. What would your goals be? For that matter, it would be a good idea to decide if you even want to use .NET for the application.

Regards,
Nish

Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
C++/CLI in Action (*E-Book is out, Print version April 6th*)

Fly on your way like an eagle
Fly as high as the sun
On your wings like an eagle
Fly and touch the sun

Re: Could please anybody help me with writing a simple program

Khodadad Pakdamans8-Apr-07 20:04

Khodadad Pakdamans

8-Apr-07 20:04

That'a C++ 6 simple program,i don't want to use .net!ok?
please help me,i'm in need of that program,
thanks again!

Re: Could please anybody help me with writing a simple program

Nish Nishant9-Apr-07 1:07

Nish Nishant

9-Apr-07 1:07

Khodadad Pakdamans wrote:
That'a C++ 6 simple program,i don't want to use .net!ok?

Then you are in the wrong forum. This forum is for C++/CLI questions.

Regards,
Nish

Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
C++/CLI in Action (*E-Book is out, Print version April 6th*)

Fly on your way like an eagle
Fly as high as the sun
On your wings like an eagle
Fly and touch the sun

named pipe: how to write array of struct

ginjikun8-Apr-07 4:13

ginjikun

8-Apr-07 4:13

hi... this is my first post here.
can someone provide me with a sample of how to write an array of struct via named pipe?
i am new to named pipe. i have tried writing using the message type mode... however i have not tried using byte mode. moreover, i have an array of struct to write.

thanks in advance for any help!

newbie Smile | :)

Re: named pipe: how to write array of struct

Mark Salsbery8-Apr-07 8:13

Mark Salsbery

8-Apr-07 8:13

This question should be posted on the Visual C++/MFC board since it doesn't seem to involve
managed C++.

In byte mode you need a pointer to the first struct you want to write. The number of bytes
to write is the sizeof the struct times the number of structs to write.

Which part is giving you trouble?

Mark

"If you can dodge a wrench, you can dodge a ball."

Re: named pipe: how to write array of struct

Mark Salsbery9-Apr-07 12:05

Mark Salsbery

9-Apr-07 12:05

Definitely a first post worthy of a 5 vote! Smile | :)

"If you can dodge a wrench, you can dodge a ball."

Re: named pipe: how to write array of struct

ginjikun13-Apr-07 7:17

ginjikun

13-Apr-07 7:17

hi Mark... thanks and sorry for the wrong post...

can i just continue the thread here and not repost in vc++? Smile | :)

i have done a sample app of writing structs via named pipe... my trouble now is how to properly manage/convert the array of structs to LPVOID which is what i am passing to the named pipe functions (readfile/writefile)... and from LPVOID back to array of structs. or should i use a different data type and not lpvoid?

thanks again!

newbie Smile | :)

c++

sakssp3-Apr-07 21:20

sakssp

3-Apr-07 21:20

how to change screen resolution to 1024 X 768 in Turbo C++

Re: c++

Christian Graus4-Apr-07 10:34

Christian Graus

4-Apr-07 10:34

First of all, C++ is a useful header for your question only because it gave me a clue that you were totally in the wrong place. 'Change screen resolution', would have been better. 'Change screen resolution in Turbo C++' would be better still, given that almost everyone on this site is using visual studio.

I doubt that Turbo C++ supports Microsoft .NET, which means that the C++/CLI forum is definately the wrong place to ask this question. Try the Visual C++ forum.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: c++

Paul Conrad8-Apr-07 20:05

Paul Conrad

8-Apr-07 20:05

Christian Graus wrote:
C++ is a useful header for your question only because it gave me a clue that you were totally in the wrong place

Christian Graus wrote:
Turbo C++

Haven't worked with that in a long, long time. I know I still have it around here somewheres :->

Re: c++

Shivam Pathak 1824-Jun-22 2:14

Shivam Pathak 18

24-Jun-22 2:14

You have to include windows.h header. Here is an working example.

#include <stdio.h>
#include <windows.h>
#include <winuser.h>

int main() {

    DEVMODE devmode;
    devmode.dmPelsWidth = 1024;
    devmode.dmPelsHeight = 768;
    devmode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
    devmode.dmSize = sizeof(DEVMODE);

    long result = ChangeDisplaySettings(&devmode, 0);

    return 0;
}

Testing the Polymorphism in C++

senthil_govi_B3-Apr-07 20:48

senthil_govi_B

3-Apr-07 20:48

hai all

can any one help in unit test where i need to test the inheritance, static and dynamic polymorphism

senthil

Re: Testing the Polymorphism in C++

Christian Graus4-Apr-07 10:35

Christian Graus

4-Apr-07 10:35

Unit test is the wrong terminology. You don't want to test your code, you want to write code that demonstrates polymorphism.

You are also in the wrong forum, you don't need C++/CLI to do this, nor does C++/CLI add any features in this regard. You wanted the Visual C++ forum.

socket program help

mhetfield19783-Apr-07 11:42

mhetfield1978

3-Apr-07 11:42

Hi all,
i want to add in that server program that it will accept only the password from the client if it's "mypassword":

i'm not writing any client program. the client will be the built in linux Telnet program

so the session will be between the server and client as follows

1. telnet 192.11.11.9 password "mypassword".

2.then the server if recieved the password "mypassword" it will connect if not it will close the connection.

I want to know how i can make the server program recognize that the pasword is right or wrong..how i can write it in the server

Thanks

Re: socket program help

Christian Graus3-Apr-07 12:01

Christian Graus

3-Apr-07 12:01

Are you using .NET, or are you in the wrong forum ?

Re: socket program help

mhetfield19783-Apr-07 12:03

mhetfield1978

3-Apr-07 12:03

No...I'm unsing C programming

Re: socket program help

Nish Nishant3-Apr-07 13:34

Nish Nishant

3-Apr-07 13:34

mhetfield1978 wrote:
No...I'm unsing C programming

Then you are in the wrong forum. This one's for .NET based C++ questions.

Regards,
Nish

Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
C++/CLI in Action (*E-Book is out, Print version April 6th*)

Converting from std::string to System::String^

flippydeflippydebop2-Apr-07 2:44

flippydeflippydebop

2-Apr-07 2:44

Hello everyone... Im just starting a new project using C++/CLI. Can some one please tell me why
this code does not work?

std::string nativeStr = "Hello World";
String^ managedStr = nativeStr.c_str();  // error C2440: 'initializing' : cannot convert from 'const char *' to 'System::String ^'

but this code does work

std::string nativeStr = "Hello World";
String^ s6 = gcnew String(nativeStr.c_str()); // works!

howevet i want to be able to create my managedStr on the stack, and would expect this to work..

Can anybody tell me where i am going wrong

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