Solved

a simple csh script

Posted on 2008-09-29
7
443 Views
Last Modified: 2013-12-26
I am looking for an example of csh script to test the input is a positive integer. Any input can help!!! Thanks!

My one didn't work
--------------------------
echo -n "Please enter a positive integer "
set input=$<
if ($input contains '-' || $input contains '.') then
    echo "wrong input"
else
   echo "input accepted"
endif
---------------------------
my problem is that I don't know how to grep the $input whether or not has a symbol minus sign i.e. '-' or decimal sign i.e. '.'
0
Comment
Question by:guochu
  • 3
  • 3
7 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 22599543
if ( $input =~ *[.-]* ) then
0
 

Author Comment

by:guochu
ID: 22599959
it won't work if the input is abc :(
0
 
LVL 84

Accepted Solution

by:
ozo earned 200 total points
ID: 22600460
abc does not have a  minus sign i.e. '-' or decimal sign i.e. '.'
if you want o disallow anything other than digits, you might do
if ( $input =~ *[\!-/:-~]* ) then
0
MIM Survival Guide for Service Desk Managers

Major incidents can send mastered service desk processes into disorder. Systems and tools produce the data needed to resolve these incidents, but your challenge is getting that information to the right people fast. Check out the Survival Guide and begin bringing order to chaos.

 

Author Comment

by:guochu
ID: 22600874
Work like a charm!!! Thanks! Can you explain [\!-/:-~] a little bit please?
0
 

Author Comment

by:guochu
ID: 22602119
Hello ozo, please explain a little bit!
0
 
LVL 84

Expert Comment

by:ozo
ID: 22602137
[^0-9] was failing in my csh when there was a * in front of it, so I used [\!-/:--~]  instead, which included the printable non-digits
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Making a simple AJAX shopping cart Couple years ago I made my first shopping cart, I used iframe and JavaScript, it was very good at that time, there were no sessions or AJAX, I used cookies on clients machine. Today we have more advanced techno…
I hope you'll find this tutorial useful and interesting. So let's try to extend Tcl with a new package.  For anyone more deeply interested please check out the book "Practical Programming in Tcl and Tk". It's really one of the best written books abo…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
Learn the basics of modules and packages in Python. Every Python file is a module, ending in the suffix: .py: Modules are a collection of functions and variables.: Packages are a collection of modules.: Module functions and variables are accessed us…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question