TRACE for C++

代码

/*  
Trace.h
*/

#ifndef __TRACE_H__
#define  __TRACE_H__

#include  < crtdbg.h >
#include  < stdarg.h >
#include  < stdio.h >
#include  < string .h >
#pragma  warning(disable : 4996)

#ifdef _DEBUG
#define  TRACEMAXSTRING    1024

inline  void  Trace( const   char *  format,...)
{
     static   char  szBuffer[TRACEMAXSTRING];
    va_list args;
    va_start(args,format);
     int  nBuf;
    nBuf  =  _vsnprintf(szBuffer,
        TRACEMAXSTRING,
        format,
        args);
    va_end(args);

    _RPT0(_CRT_WARN,szBuffer);
}
#define  TraceEx _snprintf(szBuffer,TRACEMAXSTRING,"%s(%d): ", \
     & strrchr(__FILE__, ' \\ ' )[ 1 ],__LINE__); \
    _RPT0(_CRT_WARN,szBuffer); \
    Trace

#else
inline  void  Trace( 0 );
inline  void  TraceEx( 0 );
#endif


#endif   //  __TRACE_H__

Like cout it's not Thread Safe, but using this small class, you can print message to output windows.