（Visual studio）C++ 中assert带自定义的消息

直接贴文件如下：

#ifdef  NDEBUG
#define assert(_Expression)     ((void)0)
#define assertMsg(_Expression, _Msg) ((void)0)
#else
	#include <crtdefs.h>
	#include "assert.h"
	#define assert(_Expression) (void)( (!!(_Expression)) || (_wassert(_CRT_WIDE(#_Expression), _CRT_WIDE(__FILE__), __LINE__), 0) )
	#define assertMsg(_Expression, _Msg) (void)( (!!(_Expression)) || (_wassert(_CRT_WIDE(_Msg), _CRT_WIDE(__FILE__), __LINE__), 0) )
#endif

参考自：http://social.msdn.microsoft.com/forums/en-US/vclanguage/thread/828b708c-e186-4774-b0fc-f45ddf49163b

另有一种不太好看的：

assert(a == b && "A is not equal to B");

参考自：http://stackoverflow.com/questions/3692954/add-custom-messages-in-assert