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A question about user input

Posted by remkow (remkow), 30 August 2007
I am creating a perl script, at the moment it takes 5 different variables using argv[]; which are used for different tasks in different subs in the script.
Command line syntax looks like this:
script.pl [arg for sub1] [arg for sub2] [arg2 for sub2] [arg3 for sub2] [arg for sub3]
What I want to make is something which causes the script to only run the subs which have arguments inputted, so when there are no things inputted for sub2, only sub1 and sub3 will be ran.
I was thinking of something I've done in C:
script.pl -a [arg for sub1] -c [arg for sub3]

but I've no idea on how to do something similar in perl


sorry for sounding kinda vague, I hope someone can help me out.

Posted by KevinAD (KevinAD), 31 August 2007
You could program your own custom function(s) to check the arguments but perl comes with two modules that are used for getting arguments and knowing what to do with them:

http://perldoc.perl.org/Getopt/Long.html
http://perldoc.perl.org/Getopt/Std.html

Getopt::Long is well documeed, Getopt::Std less so.

Posted by admin (Graham Ellis), 31 August 2007
I agree ... just to add - we have an example of Getopt::Std:

http://www.wellho.net/resources/ex.php4?item=p210/gop



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