10-30-2006
You need to initialise the variables num and sum
#!/bin/ksh
a=12346
b=`expr length $a`
echo " length : $b"
typeset -i i=1
num=0
sum=0
while (( i <= $b ))
do
((num=$(echo "${a}" | cut -c "${i}") ))
if (( i == 1 )); then
printf "$num"
else
printf "+$num"
fi
((sum=sum + num))
((i=i+2))
done
printf "=${sum}\n"
~
Answer
-------
length : 5
1+3+6=10
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LEARN ABOUT DEBIAN
json::rpc
JSON::RPC(3pm) User Contributed Perl Documentation JSON::RPC(3pm)
NAME
JSON::RPC - Perl implementation of JSON-RPC 1.1 protocol
DESCRIPTION
JSON-RPC is a stateless and light-weight remote procedure call (RPC)
protocol for inter-networking applications over HTTP. It uses JSON
as the data format for of all facets of a remote procedure call,
including all application data carried in parameters.
quoted from <http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html>.
This module was in JSON package on CPAN before. Now its interfaces was completely changed.
The old modules - JSONRPC::Transport::HTTP and Apache::JSONRPC are deprecated. Please try to use JSON::RPC::Server and JSON::RPC::Client
which support both JSON-RPC protocol version 1.1 and 1.0.
EXAMPLES
CGI version.
#--------------------------
# In your application class
package MyApp;
use base qw(JSON::RPC::Procedure); # Perl 5.6 or more than
sub echo : Public { # new version style. called by clients
# first argument is JSON::RPC::Server object.
return $_[1];
}
sub sum : Public(a:num, b:num) { # sets value into object member a, b.
my ($s, $obj) = @_;
# return a scalar value or a hashref or an arryaref.
return $obj->{a} + $obj->{b};
}
sub a_private_method : Private {
# ... can't be called by client
}
sub sum_old_style { # old version style. taken as Public
my ($s, @arg) = @_;
return $arg[0] + $arg[1];
}
#--------------------------
# In your triger script.
use JSON::RPC::Server::CGI;
use MyApp;
# simple
JSON::RPC::Server::CGI->dispatch('MyApp')->handle();
# or
JSON::RPC::Server::CGI->dispatch([qw/MyApp FooBar/])->handle();
# or INFO_PATH version
JSON::RPC::Server::CGI->dispatch({'/Test' => 'MyApp'})->handle();
#--------------------------
# Client
use JSON::RPC::Client;
my $client = new JSON::RPC::Client;
my $uri = 'http://www.example.com/jsonrpc/Test';
my $obj = {
method => 'sum', # or 'MyApp.sum'
params => [10, 20],
};
my $res = $client->call( $uri, $obj )
if($res){
if ($res->is_error) {
print "Error : ", $res->error_message;
}
else {
print $res->result;
}
}
else {
print $client->status_line;
}
# or
$client->prepare($uri, ['sum', 'echo']);
print $client->sum(10, 23);
See to JSON::RPC::Server::CGI, JSON::RPC::Server::Daemon, JSON::RPC::Server::Apache JSON::RPC::Client and JSON::RPC::Procedure.
ABOUT NEW VERSION
supports JSON-RPC protocol v1.1
TODO
Document
Examples
More Tests
AUTHOR
Makamaka Hannyaharamitu, <makamaka[at]cpan.org>
COPYRIGHT AND LICENSE
Copyright 2007-2008 by Makamaka Hannyaharamitu
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2008-09-01 JSON::RPC(3pm)