Initialize variable in static library [modified]

[samira forooghi]

hi every one I create a static library with visual c++ 6.0 App wizard. I create a new generic class and declared my variables in its header file. Then I initialized my variables in class constructor. I want to use it in a new dialog based project, so I add related header file and write my library name in linker tab at project setting. I create one object of this class in my function, But at the end of function when application exits from function occurs an exception. I can't handle this exception. Note : when I comment initialized this exception don’t happen. Please help me //////////////////////////////////////////////////////////////// // static library class (Test.h) ///////////////////////////////////////////////////////////////

class CTest
{
public:

CTest();
virtual ~CTest();

int		 m\_i1;//or INT   
int		 m\_i2;   

    bool		 m\_b1;//or BOOL
bool		 m\_b2;

unsigned int	 m\_ui1;//or DWORD32
unsigned int	 m\_ui2;

unsigned short   m\_us1;//or USHORT
unsigned short   m\_us2;

BYTE		 m\_bte1;//#include  in stdafx.h for BYTE data type
BYTE		 m\_bte2;

CString	 m\_str1;//#include  in stdafx.h for CString data type
CString	 m\_str2;	

};

// (Test.cpp)
///////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "Test.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CTest::CTest()
{

m\_i1=0;
m\_i2=0;  
	
m\_b1=true;
m\_b2=true;
	
m\_ui1=0;
m\_ui2=0;
	
m\_us1=1;
m\_us2=1;
	
m\_bte1=0;
m\_bte2=0;
	
m\_str1="";
m\_str2="";

}

CTest::~CTest()
{

}

//////////////////////////////////////////////////////////////// // My dialog base application ///////////////////////////////////////////////////////////////

void CUseTestLibDlg::OnBinitlib()
{
CTest *pcTest=new CTest();

    delete pcTest;
pcTest=NULL;

}// Unhandled exception in UseTestLib.exe: 0xC0000005: Access Violation.

void CUseTestLibDlg::OnBinitlib2()
{
CTest pcTest;

}// Unhandled exception in UseTestLib.exe: 0xC0000005: Access Violation.

modified on Wednesday, April 29, 2009 6:26 AM

[CPallini]

samira forooghi wrote:

pcTest=NULL; delete pcTest;

I would invert the order of the statements... :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[Stephen Hewitt]

Looks like good advice...

Steve

[samira forooghi]

thanks for u i correct it ,but its not my problem.

[Stuart Dootson]

Shouldn't cause an accvio, though - you can delete NULL in C++.

[Maximilien]

but will result in a memory leak.

This signature was proudly tested on animals.

[Stuart Dootson]

The problem's obviously in CTest's destructor. The only significant activity in CTest's destructor will be calls to m_str1's and m_str2's destructors. Therefore, the access violation is happening somewhere in there. I suspect there's something not quite right with your project settings - check that the library and main app are using hte same MFC and C run-time library settings.

[samira forooghi]

i havent any problem with new delete , occur exception even this case

void CUseTestLibDlg::OnBinitlib2()
{
CTest pcTest;
}// Unhandled exception in UseTestLib.exe: 0xC0000005: Access Violation.

[Stuart Dootson]

I didn't say it wouldn't - I was just saying that fixing it wouldn't solve the OP's problem.

[samira forooghi]

Thanks a lot

[Rajesh R Subramanian]

Yes, but Carlo just indicated one of flaws in the OP's code. I agree that it wouldn't solve 'the problem' of the OP, but it might (hopefully) prevent the OP from shooting his own face sometime in the future. :)

It is a crappy thing, but it's life -^ Carlo Pallini