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confusing error message

Started by csxpcm 5 replies 650+ views
Original Post
csxpcm
csxpcm
hello everyone, I don''t understand this problem. The compiler reports an error, but I can''t fix it. Basically, in the header file, I include the line "ofstream logFile" I need my log file to output to a file. But I keep getting the following error. Any ideas anyone? I can''t see the problem! Any suggestions much appreciated, - Thankyou in advance, kind reagrds #pragma once #include <string.h> ... class CLog { public: CLog(); ~CLog(void); .... // the usual stuff private: .... ofstream logFile; <--- error message refers to this line }; This is the error message: c:\demo\Log.h(48): error C2079: ''CLog::logFile'' uses undefined class ''std::basic_ofstream<_Elem,_Traits>'' with [ _Elem=char, _Traits=std::char_traits ]
csxpcm
csxpcm
yes, when i included that at the top of the file I received the following error.


/*
* Warning C4995, ''_OLD_IOSTREAMS_ARE_DEPRECATED'' is a deprecated name, is
* being issued because the old I/O Streams headers iostreams.h et al will no
* longer be supported from VC8. Replace references such as #include
* with #include <iostreams>, using the new, more conformant, I/O
* Streams headers.
*/


Fair enough, since I''m using VC8. However, even when i use
#include <iostream>

I still get an error message referring to the same line as before.
Thanks for the suggestion, but it still doesnt work :-(
shurcool
shurcool
hehehe... i laugh because i also had the same problem once. i was knocking my head on the table, not seeing what''s wrong. then it hit me.

try:
std::ofstream logFile;
that should fix it.

---
shurcool
wwdev
csxpcm
csxpcm
damn, still no luck! this is driving me crazy!
but thanks for the tip anyway, ill keep trying. :-)
shurcool
shurcool
quote:
Original post by csxpcm
damn, still no luck! this is driving me crazy!
but thanks for the tip anyway, ill keep trying. :-)


what i said didn't help? did it change anything? or do you still get exactly the same error message? that's weird...

here's my CLog class, see if you can get anything from it...

wwELog.h

  
#pragma once

#ifndef _wwELog_H_

#define _wwELog_H_

#include "wwEPrerequisites.h"

#include "wwEString.h"
#include "wwESingletonCleaner.h"

namespace wwE
{
	#define MESSAGE_PRIORITY_INDICATION_CHAR	'*'

	enum LoggingLevel {
		LL_LOW = 1,
		LL_NORMAL = 2,
		LL_HIGH = 3
	};

	enum LogMessageLevel {
		LML_LOW = 1,
		LML_NORMAL = 2,
		LML_HIGH = 3
	};

	class CLog
	{
	private:
		std::ofstream	m_oLog;
		LoggingLevel	m_oLoggingLevel;
		bool			m_bDebugOutput;

		inline char* MessagePriorityIndicator(LogMessageLevel oLMLevel, char *szBuffer);

	public:
		CLog(const String &sLogName, LoggingLevel oLoggingLevel = LL_NORMAL, bool bDebugOutput = true);
		~CLog();

		void LogMessage(const String &oMessage, LogMessageLevel oLMLevel = LML_NORMAL);
		void LogMessage(LogMessageLevel oLMLevel, const char *szMessage, ...);
	};
}

#endif // _wwELog_H_


wwELog.cpp

  
#include "wwELog.h"

namespace wwE
{
	CLog::CLog(const String &sLogName, LoggingLevel oLoggingLevel, bool bDebugOutput)
	{
		printf("CLog created (%s, %i, %s).\n", sLogName.c_str(), static_cast<int>(oLoggingLevel), bDebugOutput ? "true" : "false");

		m_oLog.open(sLogName.c_str());
		m_oLoggingLevel = oLoggingLevel;
		m_bDebugOutput = bDebugOutput;

		// log the log creation

		LogMessage(LML_HIGH, "log (name - '%s', logging level - %i) created", sLogName.c_str(), static_cast<int>(oLoggingLevel));
	}

	CLog::~CLog()
	{
		// log the log destruction

		LogMessage(LML_HIGH, "log successfully finished");

		m_oLog.close();

		printf("CLog destroyed.\n");
	}

	void CLog::LogMessage(const String& sMessage, LogMessageLevel oLMLevel)
	{
		if (oLMLevel + m_oLoggingLevel >= 4)
		{
			tm		*pFormattedTime;
			time_t	oRawTime;
			char	szBuffer[4] = {'\0'};

			// figure out time

			time(&oRawTime);
			pFormattedTime = localtime(&oRawTime);

			// display the message on the debugging screen, if asked to

			if (m_bDebugOutput)
				printf("%s (%i:%i:%i) %s\n", MessagePriorityIndicator(oLMLevel, szBuffer), pFormattedTime->tm_hour, pFormattedTime->tm_min, pFormattedTime->tm_sec, sMessage.c_str());

			// log the message

			m_oLog << MessagePriorityIndicator(oLMLevel, szBuffer) << " (" << pFormattedTime->tm_hour << ":" << pFormattedTime->tm_min << ":" << pFormattedTime->tm_sec << ") " << sMessage << "\n";

			// to make sure the file is written to, instead of the buffer

			m_oLog.flush();
		}
	}

	void CLog::LogMessage(LogMessageLevel oLMLevel, const char *szMessage, ...)
	{
		// don't waste time if this message isn't going to be logged anyway

		if (!(oLMLevel + m_oLoggingLevel >= 4))
			return;

		static char		szBuffer[4097];
		va_list			oList;

		va_start(oList, szMessage);
			vsprintf(szBuffer, szMessage, oList);
			LogMessage(szBuffer, oLMLevel);
		va_end(oList);
	}

	inline char* CLog::MessagePriorityIndicator(LogMessageLevel oLMLevel, char *szBuffer)
	{
		for (int iLoop1 = 0; iLoop1 < static_cast<int>(oLMLevel); iLoop1++) {
			szBuffer[2 - iLoop1] = MESSAGE_PRIORITY_INDICATION_CHAR;
		}

		for (; iLoop1 < 4; iLoop1++) {
			szBuffer[2 - iLoop1] = ' ';
		}

		return szBuffer;
	}
}


and these are my stream related standard includes (of course, most of them aren't used in the above example).

#include <fstream>
#include <iostream>
#include <iomanip>
#include <strstream>
#include <sstream>		// for int or float to string conversions


[edited by - shurcool on July 30, 2002 6:18:07 PM]
csxpcm
csxpcm
thanks everyone, ill have a look through code posted, and im sure I''ll be able to fix it.
kind reagrds

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