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Top Forums Programming Why is C/C++ considered low-level languages??? Post 302649591 by jlliagre on Thursday 31st of May 2012 06:18:18 PM
Old 05-31-2012
Quote:
Originally Posted by gabam
I have always been hearing that C/C++ are relatively low-level as compared to Java/C# etc. Could you please tell me some low-level qualities of C/C++?
I wouldn't put C and C++ in the same bag.

C is undoubtedly lower level than Java/C# in the sense in can do a lot - but not all - what can do the real low level programming languages which are assembly languages. Also, you can write C code that doesn't depend on a runtime/library, even the standard C library, with C. That's why the vast majority of operating systems kernels are written in C.

C++ is a different story. It is kind of a superset of C however, if you use C++ specific features, you are adding dependencies that make your code much higher level and runtime dependent. That would make for example C++ quite a poor choice for writing a kernel.
Quote:
And I think disk deframenters are written in C/C++, please correct me if I am wrong.
You are probably correct but a disk defragmenter is not that much an example of code requiring a "low level" programming language. You certainly can write a disk defragmenter in Java, or python or whatever.
 

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XtAppError()															      XtAppError()

Name
  XtAppError - call the low-level error handler.

Synopsis
  void XtAppError(app_context, message)
	 XtAppContext app_context;
	 String message;

Inputs
  app_context
	    Specifies the application context.

  message   Specifies the error message to be reported.

Returns
  XtAppError() terminates the application and does not return.

Description
  XtAppError()	passes	its  arguments to the installed low-level error handler.  On POSIX systems, the default handler is _XtDefaultError().
  It prints the message to the stderr stream and calls exit().

Usage
  To report non-fatal error messages or warnings without exiting, use XtAppWarning() or XtAppWarningMsg().  To	change	the  low-level	error
  handler, use XtAppSetErrorHandler().

  XtAppError()	calls  the  "low-level"  error handler.  It is better to use XtAppErrorMsg() which calls the "high-level" error handler.  The
  high-level handler looks up the error message in a resource database and so allows for customization and internationalization of error mes-
  sages.

  Although  the  Intrinsics interface allows separate error and warning handlers for each application context, most implementations will sup-
  port only a single set of handlers.  When a new handler is installed, it will be used in all application contexts.

See Also
  XtAppErrorMsg(1), XtAppSetErrorHandler(1), XtAppSetErrorMsgHandler(1), XtAppSetWarningHandler(1), XtAppSetWarningMsgHandler(1), XtAppWarn-
  ing(1), XtAppWarningMsg(1),
  XtErrorHandler(2).  XtErrorMsgHandler(2).

Xt - Error Handling														      XtAppError()
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