VC预定义宏
一、ANSI C标准预定义宏
__LINE__ 、__FILE__ 、__DATE__ 、__TIME__、__STDC__ 、__TIMESTAMP__
MSDN上的注解：
__DATE__
The compilation date of the current source file. The date is a string literal of the form Mmm dd yyyy.
The month name Mmm is the same as for dates generated by the library function asctimedeclared in
TIME.H.
__FILE__
The name of the current source file. __FILE__ expands to a string surrounded by double quotation
marks.
__LINE__
The line number in the current source file. The line number is a decimal integer constant. It can be
altered with a #line directive.
__STDC__
Indicates full conformance with the ANSI C standard. Defined as the integer constant 1 only if the /Za
compiler option is given and you are not compiling C++ code; otherwise is undefined.
__TIME__
The most recent compilation time of the current source file. The time is a string literal of the
form hh:mm:ss.
__TIMESTAMP__
The date and time of the last modification of the current source file, expressed as a string literal in
the form Ddd Mmm Date hh:mm:ss yyyy, where Ddd is the abbreviated day of the week andDate is
aninteger from 1 to 31.
二 、VC指定的预定义宏
_ATL_VER 、_CHAR_UNSIGNED 、__CLR_VER 、__cplusplus_cli 、__COUNTER__ 、__cplusplus 、_CPPLIB_VER 、_CPPRTTI 、_CPPUNWIND 、_DEBUG 、_DLL、__FUNCDNAME__ 、__FUNCSIG__ 、__FUNCTION__ 、_INTEGRAL_MAX_BITS 、_M_ALPHA 、_M_CEE 、_M_CEE_PURE 、_M_CEE_SAFE 、_M_IX86 、_M_IA64 、_M_IX86_FP 、_M_MPPC 、_M_MRX000 、_M_PPC 、_M_X64 、_MANAGED 、_MFC_VER 、__MSVC_RUNTIME_CHECKS 、_MT 、_NATIVE_WCHAR_T_DEFINED 、_OPENMP 、_VC_NODEFAULTLIB 、_WCHAR_T_DEFINED 、_WIN32 、_WIN64 、_Wp64 。
摘选部分MSDN上的注解（更多了解到http://msdn.microsoft.com/en-us/library/b0084kay.aspx）：
__COUNTER__
Expands to an integer starting with 0 and incrementing by 1 every time it is used in a compiland.
__cplusplus
Defined for C++ programs only.
_DEBUG
Defined when compiling with /LDd, /MDd, and /MTd.
_DLL
Defined when /MD or /MDd (Multithread DLL) is specified.
_MT
Defined when /MD or /MDd (Multithreaded DLL) or /MT or /MTd (Multithreaded) is specified.
_WCHAR_T_DEFINED
Defined when /Zc:wchar_t is used or if wchar_t is defined in a system header file included in your project.
_WIN32
Defined for applications for Win32 and Win64. Always defined.
_WIN64
Defined for applications for Win64.
