Some code of VC++

[tyagineha]

What does the following code do????????? #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif NT

[Christian Graus]

if _DEBUG has been defined elsewhre, it defeines DEBUG_NEW and undefines THIS_FILE, then sets it to the current file namae. It's not C++, it's nasty C preprocessor stuff. Avoid if you can.

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 )

[CPallini]

Hence he has also to avoid the MFC Application Wizard! :-D

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.

[Mark Salsbery]

Christian Graus wrote:

it's nasty C preprocessor stuff. Avoid if you can

:-D Maybe, but it's really handy for debugging MFC apps ;P

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

[Mark Salsbery]

For debug builds, it tells the compiler to use the crt debug "new" operator instead of the normal one. The debug version adds leak detection and maybe some other stuff. It also, as metioned, sets the THIS_FILE define to the current file. This information is used when dumping memory leak info. Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder