Use predefined macros commonly used in ansi c and Microsoft C ++

_ File __ Source File Name For example Xxx. cpp
_ Line __ CodeThe row number in the source file.
_ Date __ The source file completion date is shown in figure Aug 17 2011
_ Time __ The source file completion time is shown in figure 19:31:13
_ Timestamp __ The time when the source file is completed, as shown in figure Wed Aug 17 19:27:36 2011

For example, the memory allocation functionMalloc ()The above macro is used in a version

# DefineMalloc(S)_ Malloc_dbg(S,_ Normal_block, _ File __, _ line __)

You can alsoProgramUsed in_ File __And_ Line __To determine which file has an error.:

Char *Pszfilename= (Char *)Malloc(Max_path* Sizeof (char ));

If (Pszfilename=Null)

Printf("Error in % S % d \ n",_ File __, _ line __);

Of course, the actual program is mostly used_ File __And_ Line __After the error is quickly located, the system does not directly output the error, but uses another programEmailFeedback to developers.

 

Pair _ File __ It can be easily converted Wchar_t Type, Msdn Here is an example:

# DefineWiden2(X) L## X

# DefineWiden(X)Widen2(X)

# Define_ Wfile __ Widen(_ File __)

Wchar_t*Pwsz=_ Wfile __;

 

Hong Zhong#And##Will open another article.