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Full Discussion: Simple Calculator
Homework and Emergencies Homework & Coursework Questions Simple Calculator Post 302784895 by balajesuri on Saturday 23rd of March 2013 12:05:51 PM
Old 03-23-2013
Quote:
Originally Posted by herb bertz
In the command line enter the script file
/home/etc/mycalc or /home/etc/mycalc 1 + 1 . My script file should identify if the data needed to do the calculating is present (mycalc 1 + 1)
or if it needs to ask for input (mycalc).
Play around with positional parameters if you want to do such exercises. Here's a sample program to get you started.

Code:
[user@host ~]$ cat test.sh
#! /bin/bash

if [ $# -ne 2 ] # $# here is a special shell variable which gives you the number of command line arguments supplied
then
    echo "Please supply exactly two arguments."
    exit
fi

first=$1
second=$2

echo "First argument is: $first"
echo "Second argument is: $second"
[user@host ~]$ ./test.sh hello world
First argument is: hello
Second argument is: world
[user@host ~]$ ./test.sh
Please supply exactly two arguments.
[user@host ~]$

Quote:
Originally Posted by herb bertz
Also can anyone tell me how to automaticly get line numbers put in the script so when an error comes up it is easy to find the line without counting the lines?
Open the program in vi vi test.sh. In the command mode (press ESC key, if you're unsure which mode you're currently in) and type :set nu. This will display the line numbers without affecting the program functionality. To remove the line numbers type this in command mode :set nonu. And I hope you're using vi for writing your scripts and not some GUI editor.
 

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Module::Starter::Plugin::Template(3pm)			User Contributed Perl Documentation		    Module::Starter::Plugin::Template(3pm)

NAME
Module::Starter::Plugin::Template - module starter with templates VERSION
Version 1.58 SYNOPSIS
use Module::Starter qw( Module::Starter::Simple Module::Starter::Plugin::Template ); Module::Starter->create_distro(%args); DESCRIPTION
This plugin is designed to be added to a Module::Starter::Simple-compatible Module::Starter class. It adds stub methods for template retrieval and rendering, and it replaces all of Simple's _guts methods with methods that will retrieve and render the apropriate templates. CLASS METHODS
"new(%args)" This plugin calls the "new" supermethod and then initializes the template store and renderer. (See "templates" and "renderer" below.) OBJECT METHODS
"templates()" This method is used to initialize the template store on the Module::Starter object. It returns a hash of templates; each key is a filename and each value is the body of the template. The filename Module.pm is used for the module template. "renderer()" This method is used to initialize the template renderer. Its result is stored in the object's "renderer" entry. The implementation will determine its use. "render($template, \%options)" The "render" method will render the template passed to it, using the data in the Module::Starter object and in the hash of passed parameters. _guts methods All of the "FILE_guts" methods from Module::Starter::Simple are subclassed to look something like this: sub file_guts { my $self = shift; my %options; @options{qw(first second third)} = @_; my $template = $self->{templates}{filename}; $self->render($template, \%options); } These methods will need to be rewritten when (as is likely) Module::Starter::Simple's _guts methods are refactored into a registry. module_guts Makefile_PL_guts MI_Makefile_PL_guts Build_PL_guts Changes_guts README_guts t_guts MANIFEST_guts item ignores_guts AUTHOR
Ricardo SIGNES, "<rjbs at cpan.org>" Bugs Please report any bugs or feature requests to "bug-module-starter at rt.cpan.org", or through the web interface at <http://rt.cpan.org>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. COPYRIGHT
Copyright 2005-2007 Ricardo SIGNES, All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.4 2011-07-02 Module::Starter::Plugin::Template(3pm)
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