How do I create a day wise log file in Visual C++ . I wrote the code all log bind the one text file .i need day by day log .

void Ccustom::log(CString val)
ofstream ofstream_object;
		ofstream_object.open(ApplicationPath, std::ios_base::app);
		Instance=(Ccustom*)pObject;
		CStringA stime(currentTime());
		logtime=stime.AllocSysString();		
		logmsg=val.AllocSysString();
		Instance->Fire_Log(logtime,logmsg);
		SysFreeString(logtime);
		SysFreeString(logmsg);		
		CString logInfo;
		logInfo.Format("%s  :   %s",stime,val);	
		ofstream_object<<logInfo <<'\n';	
		ofstream_object.close();	
		val.Empty();
		logInfo.Empty();
		stime.Empty();