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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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XtError()																 XtError()

Name
  XtError - call the low-level fatal error handler.

Synopsis
  void XtError(message)
	 String message;

Inputs
  message   Specifies the message to be reported.

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

Availability
  XtError() has been superseded by XtAppError().

Description
  XtError()  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
  XtError() has been superseded by XtAppError(), which performs the same function on a per-application context basis.	XtError()  now	calls
  XtAppError()	passing the default application context created by XtInitialize().  Very few programs need multiple application contexts, and
  you can continue to use XtError() if you initialize your application with XtInitialize().  We recommend, however, that  you  use  XtAppIni-
  tialize(), XtAppError(), and the other XtApp*() application context specific functions.

  See XtAppError() for more information.

  XtError()  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 messages.

See Also
  XtErrorMsg(1), XtSetErrorHandler(1), XtSetWarningMsg(1), XtWarning(1), XtWarningMsg(1).

Xt - Error Handling															 XtError()
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