Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 1 year ago.
Improve this question
Is the ^ operator available in the C language? I have tried using it but it gives a faulty output.
Does it denote raising an integer to the power of something
It works just fine and means bitwise XOR. That is, 1^2 gives 3.
Unfortunately C doesn't provide a function to take power of integers. This is a known flaw of the language. You have to roll out such a function yourself either by using multiplication in a loop, or use the slow floating point function pow.
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Closed 5 years ago.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Improve this question
First time seeing this, what does this mean? Specifically the &a[i] part.
scanf("%d",&a[i])
This looks like C code that has been converted to HTML entities, so that it can be displayed on a web page. & is how you enter an & character in HTML. If you look at it in a web browser you'll see the intended C code, which is
scanf("%d",&a[i])
&a[i] means the address of the ith element of the array a. So this reads an integer from standard input, and stores it in a[i].
Don't try to read C from the HTML source code.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
I want to generate random numbers in C which are extremely random. Is there any other function than rand()? I am using windows and gcc compiler. If it is from any other library, please mention the header file.
yes
you can use arc4random(). This will give you more random number than rand().
The mersenne twister is considered a good RNG. Good randomness, fast but it can be predictable if you don't take steps.
Here you can find some versions:
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/VERSIONS/C-LANG/c-lang.html
No. There is no other function in standard C to generate random number other than rand(). GCC provide rand_r() function as an extension.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
I would like to cross check a C implementation of the CRC64 ECMA-182 algorithm.
I tried a different C code snippet I found online and I tried two online CRC calculators but each of them returned different results.
Is there some reference implementation or reference data that allows me to get a reliable reference checksum?
The EMBL-EBI web site has an online checksum calculator, that is used in the context of bioinformatics for analysing protein or genome sequences:
http://www.ebi.ac.uk/Tools/so/seqcksum/
that supports many different methods, included the CRC64-ECMA-182. You can paste your input sequence directly in the form and it will return the checksum. The problem is that the input is a sequence must be one from a set of fixed formats:
http://www.ebi.ac.uk/Tools/so/seqcksum/help/index.html#sequence
However those formats are quite simple, for example the FASTA (link)
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
Is there a Code Koans Set for C or Lisp?
I've found Koans in this languages, but no one in C or Lisp:
Ruby: http://rubykoans.com/
JavaScript: https://github.com/mrdavidlaing/javascript-koans
Clojure: https://github.com/functional-koans/clojure-koans
Scala: https://github.com/rubbish/scala-koans
May the following apocryphal stories and parables from the heyday of UNIX, C and LISP bring you some fun and enlightenment.
AI koans
Rootless root
They exist for Lisp now but not yet for C. There are C++ Koans though:
Lisp Koans
C++ Koans
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 8 years ago.
Improve this question
I remember from some time ago reading about a commandline tool that explains C code, does anyone know what it might be named?
Perhaps you mean cdecl, a program that can translate complicated declarations to English and back?
e.g.
cdecl> explain int (*(*foo)(int ))(float )
declare foo as pointer to function (int) returning pointer to function (float) returning int
If you mean explaining then I think the answers already been given. If you mean looking for potential problems then there's lint and its variants, first stop in any code review.
http://en.wikipedia.org/wiki/Lint_programming_tool
Edit:
C/C++ Free alternative to Lint?
HTH