class ArithmeticController < ApplicationController
       def create_sum
                m=rand 10
                n=rand 10
                answer=m+n
                choices=[answer]
                  while choices.size < get_nitems
                      choices << answer/2 + rand(2*answer)
                      choices.uniq!
                  end
                sum="#{m} + #{n}"
                [sum,answer,choices.sort]
        end
        def designers
          '     Co-Designer:<a href
                  ="http://www.harshshridhar.wordpress.com/">Harshendu
                    Shridhar</a>'
	end
  def start_choices
		session[:start_choices] ||= []
  end
        def first_time
                session[:correct]=session[:wrong]=0
                session[:displayed]=nil
                if params[:id] && (params[:id].to_i > 0)
                      session[:nitems] = params[:id].to_i
                else
                      session[:nitems] ||= 5
                end
                session[:problem], session[:answer],cho =
create_sum
                session[:start_choices]=cho.collect {|n|
n.to_s}
         redirect_to :action => "index"
        end
        def filechoices?
                false
        end
#       def get_title
#              'please add'
#       end
        def get_problem
                session[:problem] ||= 'default value'
        end
        def extras
                @problem = get_problem
                @displayed=get_displayed
		correct=translate('correct')
		wrong=translate('wrong')
                @title= "#{get_correct} #{correct},
#{get_wrong} #{wrong}"
        end
        def selected(str)
                if str==session[:answer].to_s
                    session[:displayed]=translate('correct')+'!'
                    session[:correct]=get_correct+1
                    session[:problem], session[:answer],
                    cho= create_sum
                    session[:start_choices]=
                    cho.collect {|n| n.to_s}
                else
                    session[:displayed]=translate('wrong')
                    session[:wrong]=get_wrong+1
                end
        end
end