C / C++ / MFC

Richard MacCutchan23-Nov-09 0:02

23-Nov-09 0:02

Don't put implementation code in header files. Place this function in one .cpp file only.

KASR123-Nov-09 0:10

23-Nov-09 0:10

For some issues we have included one function definition in header file.
That we cannot change.

However

#pragma once

should slove the problem. But it doesnt why?

Cedric Moonen23-Nov-09 0:14

Cedric Moonen

23-Nov-09 0:14

KASR1 wrote:
For some issues we have included one function definition in header file.
That we cannot change.

Why ? And why not trying to fix the original issue ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

KASR123-Nov-09 0:19

23-Nov-09 0:19

Actually this project is a static library. When linking with some exe/dll we are getting CTime link error. So we have defined a function with CTime and including that header in the exe/dll.

Richard MacCutchan23-Nov-09 0:22

23-Nov-09 0:22

You do not seem to understand the difference between declaration and implementation. Your header file should contain only the declaration e.g.

void TestMethod();

The implementation code should go in a single source file (Test.cpp) as follows:

void TestMethod()
{
    // body of the TestMethod function
}

Try reviewing the relevant sections in your C/C++ guides for further explanations.

KarstenK23-Nov-09 0:13

23-Nov-09 0:13

is in Test2 the methode ALSO defined? Dead | X|

Press F1 for help or google it.
Greetings from Germany

KASR123-Nov-09 0:14

23-Nov-09 0:14

No.

Re: Linking problem [modified]

Stuart Dootson23-Nov-09 0:22

Stuart Dootson

23-Nov-09 0:22

Mark the method as 'inline', or place it inside an anonymous namespace:

namespace {
void TestMethod()
{
..........
}
}

[edit] To expand on that answer - by including a function body in a header, it's defined in lots of .obj files. When you link, the linker attempts to merge contents of all object files into an executable. As you have lots of functions with the same signature, it can't do that. The suggestions I've given prevent that. The inline suggestion should stop the function ever existing in the object file, while ht eanonymous namespace thing stops the function being visible outside each of the object files.[/edit]

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

KASR123-Nov-09 0:26

23-Nov-09 0:26

Yes it solves the linking problem.
Its now clear. Thanks.

modified on Monday, November 23, 2009 6:33 AM

Re: Interact with Autocad.

john563223-Nov-09 3:05

john5632

23-Nov-09 3:05

use \FORCE:MULTIPLE in linker->command

Interact with Autocad.

Paulraj G22-Nov-09 22:42

Paulraj G

22-Nov-09 22:42

Hi...

How to interact with Autocad from vc6.0.

I have to get the x, y points and radius from autocad drawing...

Please help me.

Thanks...

G.Paulraj

KarstenK23-Nov-09 0:11

23-Nov-09 0:11

Read the file data and convert it or AutoCad are interfaces like COM. It dont know. Unsure | :~

It is very special stuff
=> you should try it in an AutoCad Forum or so.

Press F1 for help or google it.
Greetings from Germany

Listbox problem

Chandrasekharan P22-Nov-09 22:15

Chandrasekharan P

22-Nov-09 22:15

I have 2 listbox in my application. Now when i click on the first list box item the same item will be displayed on the second listbox and the first listbox item remains selected. now how do i remove the selected item from the second listbox if i again click on the selected item in the first listbox?

Re: Listbox problem

lxkjlzz22-Nov-09 22:24

lxkjlzz

22-Nov-09 22:24

you can remove listbox2's item when click listbox1 item,Then add listbox2's item Poke tongue | ;-P

m_listbox2.ResetContent();

Re: Listbox problem

KarstenK23-Nov-09 0:17

using WPF in MFC applcation.

23-Nov-09 0:17

you need to write that code in the message handlers of the combo box. Use the VC wizard to create a message onhandler for "CBN_SELCHANGE" or other approbiate messages.

Press F1 for help or google it.
Greetings from Germany

Re: Listbox problem

dxlee23-Nov-09 5:51

dxlee

23-Nov-09 5:51

There is not even a combobox involved. Read the original question carefully before you give an answer!

Anu_Bala22-Nov-09 21:52

Anu_Bala

22-Nov-09 21:52

Hi, I want to create MFC dailogs with glossy buttons.
So, i want to use WPF controls in MFC applcaiton.
Can you give any tutorials or samples for using it?

Anu

is it possible to handle voice messages in vc++6.0

eswar pothula22-Nov-09 20:47

eswar pothula

22-Nov-09 20:47

hi every body.....

i have a small problem in my application.......

record and save a voice message(or)file using our application.

please help me

thanks in advace...

Re: is it possible to handle voice messages in vc++6.0

Richard MacCutchan22-Nov-09 21:20

Re: is it possible to handle voice messages in vc++6.0

22-Nov-09 21:20

Take a look at Microsoft Speech API[^].

eswar pothula23-Nov-09 1:02

eswar pothula

23-Nov-09 1:02

thank you Richard MacCutchan for giving reply

if u don't mind give an any example program.

it's developed in vc++6.0

thanks in advance.

Re: is it possible to handle voice messages in vc++6.0

Richard MacCutchan23-Nov-09 3:17

Re: is it possible to handle voice messages in vc++6.0

23-Nov-09 3:17

Search the articles here on CodeProject, I am sure you will find what you need.

KarstenK22-Nov-09 21:45

22-Nov-09 21:45

You can also connect to the sound card to save some wave files.
=> http://msdn.microsoft.com/en-us/library/dd370784%28VS.85%29.aspx[^]

Press F1 for help or google it.
Greetings from Germany

showing Error

Game-point22-Nov-09 19:51

Game-point

22-Nov-09 19:51

Hello Sir

This is my source code when i compiled this , its showing some errors ..but i think the code was correct.

this is my source

#include "stdafx.h"
#include <iostream>
using namespace std;
int main(int argc, _TCHAR* argv[])
{
	static int x __asm("x") = 5;
	__asm(
	"mov eax, x;"
	"shr eax,1;"
	"mov x, eax;"
	);
	cout<<x<<endl;
	return 0;
}

error C2143: syntax error : missing ';' before '__asm'<br />
error C2400: inline assembler syntax error in 'opcode'; found '('<br />
error C2400: inline assembler syntax error in 'opcode'; found '('<br />
error C2059: syntax error : ')'<br />

Please Replay !!

Thanks!!

Raju !!!

Re: showing Error

Cedric Moonen22-Nov-09 20:45

Cedric Moonen

22-Nov-09 20:45

I'm not an expert on that field, but I think you should write it this way instead:

__asm {
mov eax, x;
shr eax,1;
mov x, eax;
}

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: showing Error

Richard MacCutchan22-Nov-09 21:25