dev-cpp-users Mailing List for Dev-C++ (Page 4)

<html><div style='background-color:'><DIV class=RTE><FONT size=5>I got this cd last semester at school in a Beginning Game Programming book and have this version (4.9.8.0) installed on my computer. I seem to be having a problem getting updates/packages. When I go to tools/check for updates/packages and then click on the red check mark I get a server error, "Error server returned code 302...". This has been happening for a few days now so I wondered if this is really a server error or what? I have never been into the updates before so I have no idea if it ever really did work.</FONT></DIV>
<DIV class=RTE><FONT size=5></FONT>&nbsp;</DIV>
<DIV class=RTE><FONT size=5>Please get back to me and let me know at your convenience.</FONT></DIV>
<DIV class=RTE><FONT size=5></FONT>&nbsp;</DIV>
<DIV class=RTE><FONT size=5>Thanks,</FONT></DIV>
<DIV class=RTE><FONT size=5>Kelly</FONT></DIV>
<DIV class=RTE>&nbsp;</DIV>
<DIV class=RTE>&nbsp;</DIV></div></html>

WNDCLASSEX l_Class;
  l_Class.cbSize = sizeof( WNDCLASSEX );
  l_Class.style = 0;
  l_Class.lpszClassName = "WindowsApp";
  l_Class.lpfnWndProc = WindowProcedure;
  l_Class.hbrBackground = NULL;
  l_Class.hCursor = NULL;
  l_Class.hIcon = NULL;
  l_Class.hIconSm = NULL;
  l_Class.lpszMenuName = NULL;
  l_Class.cbClsExtra = 0;
  l_Class.cbWndExtra = 0;

This is not working, what am I doing wrong?

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尊敬的客户：
    你好,在这信息时代，随着市场经济全球化的发展，
国内市场经济竞争日趋激烈！使商家利润难以得到保障! 
公司本着互惠互利的原则与客户建立良好的合作伙伴关系。 
   随着"金税工程"的启动，为我们的合作提供了"平台"。
公司可为商家优惠代开电脑增值税抵扣发票，国税地税
普通销售发票,广告专用发票,运输专用发票等.如贵公司
有下列情况: 
１.公司做进帐.出项有差额; 
２.客户压底货价.利润微薄； 
３.采购时需要正式票据报销； 
若您或您的朋友有这方面需要的话，请致电我们.
我们都能为您效劳, 我们是先用票后付款．具体合作方式可来电咨询！ 

        顺祝商祺!

  
       联系电话:13760375409   (张先生)

               邮箱:szs...@12...

     深圳地中海实业有限公司
               

尊敬的客户：
    你好,在这信息时代，随着市场经济全球化的发展，
国内市场经济竞争日趋激烈！使商家利润难以得到保障! 
公司本着互惠互利的原则与客户建立良好的合作伙伴关系。 
   随着"金税工程"的启动，为我们的合作提供了"平台"。
公司可为商家优惠代开电脑增值税抵扣发票，国税地税
普通销售发票,广告专用发票,运输专用发票等.如贵公司
有下列情况: 
１.公司做进帐.出项有差额; 
２.客户压底货价.利润微薄； 
３.采购时需要正式票据报销； 
若您或您的朋友有这方面需要的话，请致电我们.
我们都能为您效劳, 我们是先用票后付款．具体合作方式可来电咨询！ 

        顺祝商祺!

  
       联系电话:13760375409   (张先生)

               邮箱:szs...@12...

     深圳地中海实业有限公司
               

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Along with the correction suggested and reason for wrong answer you think you 
got don't forget to use this before return.

system("PAUSE");
return 0;

Verne

Hello, I am new to programming and to c++ and Dev-CPP. I have been
experimenting with numbers and can't figure this one out. Here is the
code the I am using:

#include<iostream>
using namespace std;
int main ()
{
    int a;
    float b;
    double c;
    long double d;
    cout << " Enter a number:  ";
    cin >> d;
    c=d;
    b=d;
    a=d;
    cout << d << endl << c << endl << b << endl << a << endl;
    return 0;
}
Here is the result with the number 123456789.123456789:
1.23457e+008
1.23457e+008
1.23457e+008
123456789
Now from what I have read, a long double should be good up to 19
digits, a long up to 15, and a float up to 7. Why does the long double
return 1.23457e+008, instead of the entered value of
123456789.123456789, which is only 18 digits long?

-- 
Paul Lane
KC9EYE
-----------------------------------------------------------------------------
"Life after all, is a fatal disease, and the mortality rate
for humans, at the end of the day is 100%."
K.C. Cole
----------------------------------------------------------------------------


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P.Lane wrote:

>Hello, I am new to programming and to c++ and Dev-CPP. I have been
>experimenting with numbers and can't figure this one out. Here is the
>code the I am using:
>
>#include<iostream>
>using namespace std;
>int main ()
>{
>    int a;
>    float b;
>    double c;
>    long double d;
>    cout << " Enter a number:  ";
>    cin >> d;
>    c=d;
>    b=d;
>    a=d;
>    cout << d << endl << c << endl << b << endl << a << endl;
>    return 0;
>}
>Here is the result with the number 123456789.123456789:
>1.23457e+008
>1.23457e+008
>1.23457e+008
>123456789
>Now from what I have read, a long double should be good up to 19
>digits, a long up to 15, and a float up to 7. Why does the long double
>return 1.23457e+008, instead of the entered value of
>123456789.123456789, which is only 18 digits long?
>  
>
That output is right. Standard setting for floating point values bigger 
than 10^6 is scientific notation with first 6 digits. Try tampering with 
output formating mathods of std::ostream.

Happy coding,
next_ghost

Hello, I am new to programming and to c++ and Dev-CPP. I have been
experimenting with numbers and can't figure this one out. Here is the
code the I am using:

#include<iostream>
using namespace std;
int main ()
{
    int a;
    float b;
    double c;
    long double d;
    cout << " Enter a number:  ";
    cin >> d;
    c=3Dd;
    b=3Dd;
    a=3Dd;
    cout << d << endl << c << endl << b << endl << a << endl;
    return 0;
}
Here is the result with the number 123456789.123456789:
1.23457e+008
1.23457e+008
1.23457e+008
123456789
Now from what I have read, a long double should be good up to 19
digits, a long up to 15, and a float up to 7. Why does the long double
return 1.23457e+008, instead of the entered value of
123456789.123456789, which is only 18 digits long?

--=20
Paul Lane
KC9EYE
---------------------------------------------------------------------------=
--
"Life after all, is a fatal disease, and the mortality rate=20
for humans, at the end of the day is 100%."
K.C. Cole
---------------------------------------------------------------------------=
-

Sorry, you have to generate your permutation yourself.

Depending on how you generate your permutations, you can calculate where a
specific permutation should be stored in the array.

There will be a total of 8! or 40320 permutations. Depending on algorithm
implementation, the permutations may also be stored as a large bit array,
where non-eliminated permutations are located by scanning the bit array
32-bit at a time.

/Per W

On Fri, 12 Aug 2005, Pablo Itaim A. wrote:

> Hi, i'm trying to implemet a hill climbing algorithm with a greedy initial heuristic for the n queen problem.
> For the greedy, i wanto to have an array with all the permuted columns.
> is there any c command for genering permuted arrays?
> how can i eliminate a value from that array without searching the complete array?
>
> Thank you for the help and i hope that you can undertand my english ;-)
>
> Pablo

Simply use cin.get();
return 0;
// This works nicely in all three of the programs I use though sometimes the 
'system("PAUSE");  will work as well in Borland, Dev C++ or Ms V c++.
Verne
----- Original Message ----- 
From: "lordSauron" <lor...@gm...>
To: <dev...@li...>
Sent: Friday, August 12, 2005 2:48 PM
Subject: Fwd: FW: [Dev-C++] Execution Problem


what if you said cin.ignore (0, '\n'); ???

Does anyone know if that'd work?  Or maybe putting in a negative
number or something... I dunno.  There should just be a way to do
this, but you might have to get sneaky and be weird like this:

while (true) {
 if (getc() != '\n')
 break;
}

or something to that effect.

NOTE: dangit.  forgot to change the to: area to dev-cpp-users.
MESSAGE TO ADMIN:  make the place have a reply-to adress PLEASE!!!
it's really screwing me up!


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what if you said cin.ignore (0, '\n'); ???

Does anyone know if that'd work?  Or maybe putting in a negative
number or something... I dunno.  There should just be a way to do
this, but you might have to get sneaky and be weird like this:

while (true) {
 if (getc() !=3D '\n')
 break;
}

or something to that effect.

NOTE: dangit.  forgot to change the to: area to dev-cpp-users.=20
MESSAGE TO ADMIN:  make the place have a reply-to adress PLEASE!!!=20
it's really screwing me up!

Hi, i'm trying to implemet a hill climbing algorithm with a greedy =
initial heuristic for the n queen problem.=20
For the greedy, i wanto to have an array with all the permuted columns.=20
is there any c command for genering permuted arrays?
how can i eliminate a value from that array without searching the =
complete array?

Thank you for the help and i hope that you can undertand my english ;-)

Pablo

Farzan Hajian wrote:

> I have a problem with variable declaration.
> Please tell me what the following declaration means?
>
> int * const * ptr;
>
> I know that "ptr" is a pointer to "int * const". But what "int * 
> const"  means.


I know that Shachar already answered, but I thought that it was a bit 
confusing; so I'll try too.

Considering that T is a type, you can write:
T obj;
T * pobj;

Where "obj" is a variable of type "T", and "pobj" is a pointer to a 
variable of type T.
Now, replace "T" with a type like "int" and you have:
int obj;
int * obj;

But "int *" is also a type; you could write:
typedef int * pint;   /*   now "pint" is a synonym for "int *"   */
pint obj;
pint * pobj;

The typedef "pint" is just a convenience here; if you remove it, you can 
write the equivalent code:
int * obj;
int * * pobj;

So, "obj" is a pointer to "int", and "pobj" is a pointer to pointer to 
"int".
Now if you want to declare the "int" value as constant, you can:
const int * * pobj;
or
int const * * pobj;

Now you can't change the end of the two pointers (the "int" value).
int * a;
pobj = &a;     /* ok, assigning the address of variable "a"  */
*pobj = a;      /* ok, assigning the address stored in "a" */
**pobj = *a;    /*  error, assignment of read-only location   */

You can also declare the variable itself ("pobj") as const, so its value 
can't be changed.
int * a;
int * * const pobj;
pobj = &a;    /*  error, assignment of read-only location */
*pobj = a;     /* ok, assigning the address stored in "a" */
**pobj = *a;  /* ok, assigning the integer pointed by "a"  */

And finally, you can add a const so the value pointed by "pobj" (a 
pointer) can't be changed.
int * a;
int * const * pobj;
pobj = &a;    /* ok, assigning the address of variable "a"  */
*pobj = a;     /*   error, assignment of read-only location   */
**pobj = *a;   /* ok, assigning the integer pointed by "a"  */


---
Daniel K. O.


	
	
		
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On 8/12/05, Farzan Hajian <far...@ho...> wrote:
> Hi,
> I have a problem with variable declaration.
> Please tell me what the following declaration means?
>=20
> int * const * ptr;
>=20
> I know that "ptr" is a pointer to "int * const". But what "int * const"
> means.

You have a 2 level pointer, out of which the second one is constant. I
will try to illustrate this:

Lets assume ptr =3D=3D 0x1000

Additionally, in address 0x1000 you have the value 0x2000

And finally, in address 0x2000 you have the value 0x3000


So, writing **ptr will get you the integer value at address 0x2000
(meaning if you will do printf("0x%X",**ptr); you will get 0x3000) ,
and will allow you to change it (meaning that you will be able to
assign a different value there), and writing *ptr will get you the
address 0x2000 (meaning that if you will do printf("%p",*ptr); you
will get 0x2000), which you won't be able to change. Finally, you will
be able to change address ptr itself is pointing to, which currently
is 0x1000.

   Regards,
   Shachar

Hi,
I have a problem with variable declaration.
Please tell me what the following declaration means?

int * const * ptr;

I know that "ptr" is a pointer to "int * const". But what "int * const" =20
means.

Thanks,

--=20
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

I didn't know this. thx
Krisztian

> fflush(stdin) isn't portable either, so that should probably be 
> replaced  with cin.ignore(8) or something. (with the argument being 
> greater if you  anticipate more than 8 chars of garbage in the stdin 
> queue).
>
>
>

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fflush(stdin) isn't portable either, so that should probably be replaced  
with cin.ignore(8) or something. (with the argument being greater if you  
anticipate more than 8 chars of garbage in the stdin queue).

On Thu, 11 Aug 2005 08:35:45 -0700, Per Westermark <pw...@ia...>  
wrote:
> Note that system("pause") isn't portable, and that Markella did post a
> solution similar in function to system("pause").
>
> /Per W
>
> On Thu, 11 Aug 2005, Lamana, Michael wrote:
>
>>  Sounds more like a missing 'system("PAUSE");' statement.  If the input
>> is the last thing in the program, it is probably just terminating
>> normally and closing the shell.
>>
>> -----Original Message-----
>> From: dev...@li...
>> [mailto:dev...@li...] On Behalf Of Markella
>> Krisztian
>> Sent: Thursday, August 11, 2005 6:14 AM
>> To: dev...@li...
>> Subject: Re: [Dev-C++] Execution Problem
>>
>> #include <iostream>
>> using namespace std;
>>
>> int main(int argc, char *argv[])
>> {
>>   cout << "give me a number: "; int number; cin >> number;
>>   cout << "you typed this number: " << number << endl;
>>
>> //maybe you need just this
>> //you wait for an Enter and keep the window open
>>   fflush(stdin); cin.get();
>>   return 0;
>> }
>> Krisztian
>>
>> >Hi,
>> >
>> >Whenever I enter the input data and hit enter, the output is not
>> >displayed and the run window closes immediately. i am using Dev C++
>> >4.9.9.2.

Mark Ament wrote:

> Hi Steve,
>
> I'm using your suggestion, but it has no effect.
> I still get an error from CoCreateInstance: 0x800401F0
> It is CO_E_NOTINITIALIZED
> 'Failed to connect to server'
>
> Surfing the internet results in hints that it may have something to do 
> with 'MsiInstaller', 'Events'.
> 'Exchange Server 5.5 Service Pack 2 (SP2)', 'CoInitialize has not been 
> called'.
>
> I tried using OleInitialize(..) or CoInitializeEx(..) but these crash!
>
> I've now found the solution!
> I use CoInitialize(NULL) in stead of CoInitializeEx(..)
>
> Thanks for your help by the way :)
>
> greetings,
>
> Mark Ament
>
> ----- Original Message ----- From: "Steve Higham" <st...@sj...>
> To: "Mark Ament" <am...@ho...>
> Cc: <dev...@li...>
> Sent: Thursday, August 11, 2005 7:05 PM
> Subject: Re: [Dev-C++] Windows, COM, CoCreateInstance and OleInitialize
>
>
>> Mark Ament wrote:
>>
>>> Hi there!
>>> I was trying all possibilities of DEV-C++ and I was pretty excited 
>>> about it.
>>> But I've encountered a problem.
>>> In the Windows-operating-systems it is pretty important to use 
>>> components (COM).
>>> I've made a "windows application" project and added the following code:
>>> ----------------------------------------
>>> const CLSID CLSID_Printing = 
>>> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
>>> const IID IID_IUnknown = 
>>> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>>> const IID IID_IClassFactory 
>>> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>>> const CLSID CLSID_MySimpleObj 
>>> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>>> const IID IID_IMySimpleObj 
>>> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>>> interface IMySimpleObj : public IUnknown {
>>> virtual HRESULT msg()=0;
>>> };
>>> int WINAPI WinMain (HINSTANCE hThisInstance,
>>> HINSTANCE hPrevInstance,
>>> LPSTR lpszArgument,
>>> int nFunsterStil) {
>>> MessageBox(0,"Test Start..","Project2",0);
>>> //OleInitialize(0); //<-Creates a crash!
>>> IUnknown * schaap;
>>> schaap = NULL;
>>> HRESULT hr;
>>> hr = 
>>> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap); 
>>>
>>> if (schaap!=NULL) {
>>> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
>>> schaap->Release();
>>> schaap = NULL;
>>> }
>>> //OleUninitialize();
>>> MessageBox(0,"Test Done..","Project2",0);
>>> //HERE THE REST OF THE WinMain-Code!
>>> }
>>>
>>> ----------------------------------------
>>> Secondly: in the menu 'Project' -> 'Project Options' --tab-> 
>>> Parameters --button-> Add Library or Object
>>> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
>>> The problem is that CoCreateInstance never succeeds in creating an 
>>> object!
>>> So I also tried to do a "OleInitialize(0)", but this one always 
>>> results in crashing!
>>> I hope this problem can be solved to meet the important requirement 
>>> of using COM in DEV-C++ !
>>> greetings,
>>> Mark Ament
>>
>>
>> Hi Mark,
>>
>> I'm using COM without any problems.
>>
>> I'm using the libraries that came with Dev-Cpp - Try using 
>> Dev-Cpp\lib\libole32.a. This should work fine.
>>
>> Regards,
>>
>> Steve
>>
>> -- 
>>
>> Steve Higham
>>
>> › st...@sj... <mailto:st...@sj...>
>>
>>
>
>
>
Hi Mark,

My code also uses CoInitialize(NULL).

Regards,

Steve

-- 

Steve Higham

› st...@sj... <mailto:st...@sj...>

Hi Steve,

I'm using your suggestion, but it has no effect.
I still get an error from CoCreateInstance: 0x800401F0
It is CO_E_NOTINITIALIZED
'Failed to connect to server'

Surfing the internet results in hints that it may have something to do with 
'MsiInstaller', 'Events'.
'Exchange Server 5.5 Service Pack 2 (SP2)', 'CoInitialize has not been 
called'.

I tried using OleInitialize(..) or CoInitializeEx(..) but these crash!

I've now found the solution!
I use CoInitialize(NULL) in stead of CoInitializeEx(..)

Thanks for your help by the way :)

greetings,

Mark Ament

----- Original Message ----- 
From: "Steve Higham" <st...@sj...>
To: "Mark Ament" <am...@ho...>
Cc: <dev...@li...>
Sent: Thursday, August 11, 2005 7:05 PM
Subject: Re: [Dev-C++] Windows, COM, CoCreateInstance and OleInitialize


> Mark Ament wrote:
>
>> Hi there!
>> I was trying all possibilities of DEV-C++ and I was pretty excited about 
>> it.
>> But I've encountered a problem.
>> In the Windows-operating-systems it is pretty important to use components 
>> (COM).
>> I've made a "windows application" project and added the following code:
>> ----------------------------------------
>> const CLSID CLSID_Printing = 
>> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
>> const IID IID_IUnknown = 
>> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>> const IID IID_IClassFactory 
>> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>> const CLSID CLSID_MySimpleObj 
>> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>> const IID IID_IMySimpleObj 
>> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>> interface IMySimpleObj : public IUnknown {
>> virtual HRESULT msg()=0;
>> };
>> int WINAPI WinMain (HINSTANCE hThisInstance,
>> HINSTANCE hPrevInstance,
>> LPSTR lpszArgument,
>> int nFunsterStil) {
>> MessageBox(0,"Test Start..","Project2",0);
>> //OleInitialize(0); //<-Creates a crash!
>> IUnknown * schaap;
>> schaap = NULL;
>> HRESULT hr;
>> hr = 
>> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap);
>> if (schaap!=NULL) {
>> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
>> schaap->Release();
>> schaap = NULL;
>> }
>> //OleUninitialize();
>> MessageBox(0,"Test Done..","Project2",0);
>> //HERE THE REST OF THE WinMain-Code!
>> }
>>
>> ----------------------------------------
>> Secondly: in the menu 'Project' -> 'Project Options' --tab-> 
>> Parameters --button-> Add Library or Object
>> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
>> The problem is that CoCreateInstance never succeeds in creating an 
>> object!
>> So I also tried to do a "OleInitialize(0)", but this one always results 
>> in crashing!
>> I hope this problem can be solved to meet the important requirement of 
>> using COM in DEV-C++ !
>> greetings,
>> Mark Ament
>
> Hi Mark,
>
> I'm using COM without any problems.
>
> I'm using the libraries that came with Dev-Cpp - Try using 
> Dev-Cpp\lib\libole32.a. This should work fine.
>
> Regards,
>
> Steve
>
> -- 
>
> Steve Higham
>
> › st...@sj... <mailto:st...@sj...>
>
> 

Per Westermark wrote:

>Note that Libs= is empty and that the linking is done using the full
>library name (excluding path).
>
>Note that the libraries are not specified with the -l parameter, so gcc
>will not care about any library paths (-Lxxx).
>
>An expected link line should have looked like:
>
>gcc ... -L"C:/Dev-Cpp/lib -lole32 -loleaut32
>
>/Per W
>
>On Thu, 11 Aug 2005, Steve Higham wrote:
>
>  
>
>>sudhir kumar wrote:
>>
>>[Project]
>>
>>Libs=
>>
>>Linker=libole32.a_@@_liboleaut32.a _@@_
>>
>>This is now portable. However is does not compile. The compile log is as
>>follows:
>>
>>Compiler: Default compiler
>>
>>Building Makefile: "C:\Documents and Settings\Steve Higham\My
>>Documents\Dev\ConsoleTest\Makefile.win"
>>
>>Executing make clean
>>
>>rm -f main.o ConsoleTest.exe
>>
>>g++.exe -D__DEBUG__ -c main.cpp -o main.o
>>-I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include"
>>-I"C:/Dev-Cpp/include/c++/3.4.2/backward"
>>-I"C:/Dev-Cpp/include/c++/3.4.2/mingw32"
>>-I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -g3
>>
>>g++.exe -D__DEBUG__ main.o -o "ConsoleTest.exe" -L"C:/Dev-Cpp/lib"
>>libole32.a liboleaut32.a -g3
>>
>>g++.exe: libole32.a: No such file or directory
>>
>>g++.exe: liboleaut32.a: No such file or directory
>>
>>make.exe: *** [ConsoleTest.exe] Error 1
>>
>>Execution terminated
>>
>>
>>I don't understand why this fails. The -L switch identifies the correct
>>directory (C:/Dev-Cpp/lib) and the lib names are correct. This is the issue.
>>
>>It's probably not the most important issue in the world. But it would be
>>nice to resolve it.
>>
>>Kind Regards,
>>
>>Steve
>>
>>--
>>
>>Steve Higham
>>
>>› st...@sj... <mailto:st...@sj...>
>>    
>>
>
>
>  
>
Per,

You're quite right.

Replacing "C:\Dev-Cpp\lib\libole32.a" with "-lole32" in the Parameters - 
Linker box has resolved the issue.

Many Thanks,

Steve

-- 

Steve Higham

› st...@sj... <mailto:st...@sj...>

Mark Ament wrote:

> Hi there!
> I was trying all possibilities of DEV-C++ and I was pretty excited 
> about it.
> But I've encountered a problem.
> In the Windows-operating-systems it is pretty important to use 
> components (COM).
> I've made a "windows application" project and added the following code:
> ----------------------------------------
> const CLSID CLSID_Printing = 
> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
> const IID IID_IUnknown = 
> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
> const IID IID_IClassFactory 
> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
> const CLSID CLSID_MySimpleObj 
> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
> const IID IID_IMySimpleObj 
> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
> interface IMySimpleObj : public IUnknown {
> virtual HRESULT msg()=0;
> };
> int WINAPI WinMain (HINSTANCE hThisInstance,
> HINSTANCE hPrevInstance,
> LPSTR lpszArgument,
> int nFunsterStil) {
> MessageBox(0,"Test Start..","Project2",0);
> //OleInitialize(0); //<-Creates a crash!
> IUnknown * schaap;
> schaap = NULL;
> HRESULT hr;
> hr = 
> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap);
> if (schaap!=NULL) {
> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
> schaap->Release();
> schaap = NULL;
> }
> //OleUninitialize();
> MessageBox(0,"Test Done..","Project2",0);
> //HERE THE REST OF THE WinMain-Code!
> }
>
> ----------------------------------------
> Secondly: in the menu 'Project' -> 'Project Options' --tab-> 
> Parameters --button-> Add Library or Object
> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
> The problem is that CoCreateInstance never succeeds in creating an object!
> So I also tried to do a "OleInitialize(0)", but this one always 
> results in crashing!
> I hope this problem can be solved to meet the important requirement of 
> using COM in DEV-C++ !
> greetings,
> Mark Ament

Hi Mark,

I'm using COM without any problems.

I'm using the libraries that came with Dev-Cpp - Try using 
Dev-Cpp\lib\libole32.a. This should work fine.

Regards,

Steve

-- 

Steve Higham

› st...@sj... <mailto:st...@sj...>

yes that is a good point.  You really should use ignore() or something
like that as opposed to system() commands because they are deathly
non-portable.  Making them portable is really a pain too.  However,
system() commands are necessary in certain situations so don't shelf
the idea entirely.

Note that Libs=3D is empty and that the linking is done using the full
library name (excluding path).

Note that the libraries are not specified with the -l parameter, so gcc
will not care about any library paths (-Lxxx).

An expected link line should have looked like:

gcc ... -L"C:/Dev-Cpp/lib -lole32 -loleaut32

/Per W

On Thu, 11 Aug 2005, Steve Higham wrote:

> sudhir kumar wrote:
>
> [Project]
>
> Libs=3D
>
> Linker=3Dlibole32.a_@@_liboleaut32.a _@@_
>
> This is now portable. However is does not compile. The compile log is as
> follows:
>
> Compiler: Default compiler
>
> Building Makefile: "C:\Documents and Settings\Steve Higham\My
> Documents\Dev\ConsoleTest\Makefile.win"
>
> Executing make clean
>
> rm -f main.o ConsoleTest.exe
>
> g++.exe -D__DEBUG__ -c main.cpp -o main.o
> -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include"
> -I"C:/Dev-Cpp/include/c++/3.4.2/backward"
> -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32"
> -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -g3
>
> g++.exe -D__DEBUG__ main.o -o "ConsoleTest.exe" -L"C:/Dev-Cpp/lib"
> libole32.a liboleaut32.a -g3
>
> g++.exe: libole32.a: No such file or directory
>
> g++.exe: liboleaut32.a: No such file or directory
>
> make.exe: *** [ConsoleTest.exe] Error 1
>
> Execution terminated
>
>
> I don't understand why this fails. The -L switch identifies the correct
> directory (C:/Dev-Cpp/lib) and the lib names are correct. This is the iss=
ue.
>
> It's probably not the most important issue in the world. But it would be
> nice to resolve it.
>
> Kind Regards,
>
> Steve
>
> --
>
> Steve Higham
>
> =9B st...@sj... <mailto:st...@sj...>

sudhir kumar wrote:

>--- Steve HiHighamststevejsjlto.ukukwrote:
>
>  
>
>>Hi,
>>
>>I'm a newbie Dev-CpCppser although I have been
>>coding in C++ for several 
>>years.
>>
>>I'm very pleased with Dev-CpCppHowever I've found a
>>couple of minor 
>>features / bugs (see below). How do I report these?
>>
>>Kind Regards,
>>
>>Steve
>>
>>Issue 1 - Library Locations
>>==================
>>When including libraries it is necessary to provide
>>a full path. Even 
>>when the libraries are in the default location. For
>>example system 
>>libraries in C:\Dev-CpCppib. Furthermore when
>>browsing for the directory 
>>using the "Add Library of Object" button the library
>>is added using a 
>>relative path. This has the following unfortunate
>>consequences:-
>>The project will fail to build if the location of
>>the project file 
>>changes with respect to the install directories
>>(e.g. moving a complete 
>>project will break the build).
>>The file name passed to the linker becomes much
>>larger (e.g. 
>>../../../../../../Dev-CpCppib/lilibuuid). This might
>>cause problems on 
>>large projects.
>>
>>Issue 2 - Dual Monitor and / or large monitor issue
>>==================================
>>I have installed Dev-CpCppn an AcAceraptop with dual
>>monitor support. 
>>The second (plugged in) monitor is running at a
>>resolution of 1280 X 
>>1024. When I try to maximise Dev-CpCppn the second
>>monitor it only uses 
>>the top 75% of the monitor. I have not experienced
>>this issue with any 
>>other programs.
>>-- 
>>
>>Steve HiHigham> 
>>É +44 (0)1663 719830
>>È +44 (0)7773 381215
>>› ststevejsjlto.ukukmamailtotstevejsjlto.ukuk
>>
>>
>>
>>
>>    
>>
>-------------------------------------------------------
>  
>
>>SF.Net email is Sponsored by the Better Software
>>Conference & EXPO September
>>19-22, 2005 * San Francisco, CA * Development
>>LiLifecyclerPractices> Agile & Plan-Driven
>>    
>>
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>  
>
>>& Teams * Testing & QAQA> Security * Process
>>    
>>
>Improvement & Measurement *
>  
>
>>hthttp/wwwwwqsqeom/bsbscef
>>_______________________________________________
>>Dev-cpcppsers mailing list
>>Dev-cpcppsers@lists.sosourceforgeet
>>TO UNUNSUBSCRIBE
>>hthttp/wwwww.brbrinksterom/nonoicysedevcppbubthtm>
>>    
>>
>hthttps/lists.sosourceforgeet/lists/lilistinfoedevpcppsers
>  
>
>
>hi,
>
>  In regard to your first issue:
>=================================
>
>   If your library doesn't resides in default library
>path, you can alternativily add the directory where
>your library files resides  by adding "-L<dir_name>"
>to "additional commandline parameters" for c/c++
>compiler or adding the the directory in the
>"directory" tab in "project options" .Now link the
>required library by adding "-l" option in the
>"parameters" tab .If you want to link "libXYZ.a" then
>the linker parameter will be "-lXYZ"
>
>
>e.g , you want to link with "c:\lib\libXYZ.a" then
>1.)add "-Lc:\lib" to compilier paremeters or add the
>"c:\lib" directory in  library directories.
>
>2.)add "-lXYZ" in the linker options.
>
>
>  Pardon for my english.
>
>     Sudhir kumar porwal 
>
>
>	
>
>	
>		
>____________________________________________________
>Send a rakhi to your brother, buy gifts and win attractive prizes. Log on to http://in.promos.yahoo.com/rakhi/index.html
>
>  
>
Sudhir,

Thanks for your help. However this does not address the issue.

The first approach to adding a library via the IDE is to use the "Add
Library or Object" dialog. Using a standard library produces the
following entries in the .dev file:-

[Project]

Libs=

Linker=../../../../../Dev-Cpp/lib/libole32.a_@@_../../../../../Dev-Cpp/lib/liboleaut32.a_@@_

This compiles fine. However the entries use a relative path from the
project directory to the library directory. In other words moving the
project directory will break the build. This is not good.

By editing the entries in the "Linker" box of the IDE we can ad the full
path in. This improves the situation. The .dev file now looks like this

[Project]

Libs=

Linker=C:\Dev-Cpp\lib\libole32.a_@@_C:\Dev-Cpp\lib\liboleaut32.a_@@_

This also compiles fine. However the dev file now contains full
addresses for all libraries. Again this is a portability issue. This may
also cause problems with large projects due to shell limitations on the
command line length.

The correct solution is to only add the library name. This produces the
following entry in the .dev file

[Project]

Libs=

Linker=libole32.a_@@_liboleaut32.a _@@_

This is now portable. However is does not compile. The compile log is as
follows:

Compiler: Default compiler

Building Makefile: "C:\Documents and Settings\Steve Higham\My
Documents\Dev\ConsoleTest\Makefile.win"

Executing make clean

rm -f main.o ConsoleTest.exe

g++.exe -D__DEBUG__ -c main.cpp -o main.o
-I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include"
-I"C:/Dev-Cpp/include/c++/3.4.2/backward"
-I"C:/Dev-Cpp/include/c++/3.4.2/mingw32"
-I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -g3

g++.exe -D__DEBUG__ main.o -o "ConsoleTest.exe" -L"C:/Dev-Cpp/lib"
libole32.a liboleaut32.a -g3

g++.exe: libole32.a: No such file or directory

g++.exe: liboleaut32.a: No such file or directory

make.exe: *** [ConsoleTest.exe] Error 1

Execution terminated


I don't understand why this fails. The -L switch identifies the correct
directory (C:/Dev-Cpp/lib) and the lib names are correct. This is the issue.

It's probably not the most important issue in the world. But it would be
nice to resolve it.

Kind Regards,

Steve

-- 

Steve Higham

› st...@sj... <mailto:st...@sj...>