Passing command line arguments to C file and returning answers from C file

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I have c language file with my algorithm in it and I have done command line arguments. I have compiled the file and got the assembler output file also. Now I need to pass values to my output of c file from perl script and get back the values from c file. Need help.
thanks in advance.

What I have tried:

I am not very familiar with perl scripting.

Posted 26-Mar-17 23:31pm

R!sh!

Updated 26-Mar-17 23:52pm

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Garth J Lancaster 27-Mar-17 5:39am

just to clarify

a) you have a 'c' program
b) the 'c' program takes command line arguments
c) the 'c' program works
d) the 'c' program returns values via ?stdout
e) you wish to call the 'c' program from perl, pass the 'c' program arguments, and collect its output

'd' is the one you havnt really described well - how does the 'c' program return data -
f) as an exit code (if its just an integer for example)
g) as a file
h) it writes to stdout

confirming (or not) that understanding may help us help you

oh, and, are you running on Windows, *nix, .....

R!sh! 27-Mar-17 5:43am

sorry for not providing proper information. C file just prints the output. That output I need. Code is such that, once the data is printed it will stop execution and your clarification is correct.

R!sh! 27-Mar-17 5:44am

I am using linux( fedora 22)

Garth J Lancaster 27-Mar-17 5:53am

I posted a solution below using 'backticks' - many ways to skin a cat in Perl there is

Richard MacCutchan 27-Mar-17 5:39am

You just add the parameters to the command line of your executable file:

your.exe param1 param2 ... paramN

As to learning Perl, Google will find you many references.

R!sh! 27-Mar-17 5:43am

how do i collect back the printed data in c file. I have printed the output using printf.

Richard MacCutchan 27-Mar-17 6:02am

Send the output to a file, either in the code of the program or through command line redirection.

R!sh! 27-Mar-17 6:04am

collecting the output of printed lines is not possible?

Richard MacCutchan 27-Mar-17 7:53am

Yes it is possible, as I suggested above.

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CPallini · Accepted Answer · 2017-03-26T23:47:00

Solution 1

You may find many examples and tutorials on the web, just using Google. See, for instance:
Running external programs from Perl with system[^].

Posted 26-Mar-17 23:47pm

CPallini

Garth J Lancaster · Accepted Answer · 2017-03-26T23:52:00

Solution 2

you may need to try a few different approaches - in Perl there are heaps of options - as others have said, Google would find some, but, here's a simple one, using 'backticks'

PERL

my $str = `your-prog arg1 arg2 .. argn`;

$str will hold the result ('stdout') from your-prog

Posted 26-Mar-17 23:52pm

Garth J Lancaster