From: Axel Etzold <AEtzold@...>
Date: 2008-06-10T16:33:17+09:00
Subject: Re: C++ 2 Ruby


-------- Original-Nachricht --------
> Datum: Tue, 10 Jun 2008 07:53:25 +0900
> Von: Jed Kowalski <satanowicz@gmail.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Re: C++ 2 Ruby

> Axel Etzold wrote:
> > Jed, you could do this:
> > 
> > class MyClass  # my most creative invention of a class name
> >   attr_accessor :price,:amount,:name,:bought  # creates ways to get/set 
> > @price,@amount,... from MyClass
> > 
> >  def initialize (cen, ile, nn)
> >        @price=cen
> >        @amount=ile
> >        @name=nn
> >        @bought=0
> >      end
> >     def change(x)
> >           @amount-=1
> >           @bought+=1
> >           x-self.price
> >     end
> >   end
> > 
> >   cen=500
> >   ile=400
> >   nn=4
> >   obj=MyClass.new(cen,ile,nn)
> >   p obj.change(1)  # -499 =1-500
> > 
> > Read about accessors here: 
> > http://www.ruby-doc.org/docs/UsersGuide/rg/accessors.html
> > 
> > Best regards,
> > 
> > Axel
> 
> ufff... almoust done...
> I can compile the code but it doesn't want to work, juz like the 
> variable q isn't seen properly, something with the 'case' instruction 
> maybe?
> (BTW sorry for Polish texts)
> 
> class Napoj
> 
>    def initialize (cen, ile, nn)
>      @cena=cen
>        @ilosc=ile
>        @nazwa=nn
>        @kupione=0
>      end
> 
>     def wydajreszte(x)
>           @ilosc-=1
>           @kupione+=1
>           return x-cena
>     end
>    def ilosci() return ilosc end
>    def cenaa() return cena end
>    def kupno() return kupione end
>    def czyjest()
>         if ilosc==0 then
>         return false
>         else return true
>           end
>                  end
>    def nazwaa() puts nazwa end
> 
> end
> class Automat
> 
>   def initialize (pie, dwa, jed, piec, dwad, dzi)
>     @tab = [[pie, dwa, jed, piec, dwad, dzi],[5,2,1,0.5,0.2,0.1]]
>          end
>    def monety(n, s, g)
>          x=s-n[g].cena
>               for  i in 1.. 5
>                                 w=tab[0][i]
>               for  w in w..0
>                 if (x-tab[1][i])> -0.0001    then
>                                                    tab[0][i]-=1
>                                                    x=x-tab[1][i]
>                                                    puts tab[1][i]
>                                                       end
>               end
>               end
>                                        end
>   def wypisz()
>         puts "Monet 5zl: ", tab[0][0]
>         puts "Monet 2zl: ", tab[0][1]
>         puts "Monet 1zl: ", tab[0][2]
>         puts "Monet 50gr: ", tab[0][3]
>         puts "Monet 20gr: ", tab[0][4]
>         puts "Monet 10gr: ", tab[0][5]
>         end
>   def dodaj(x)
>         if  x==5    then tab[0][0]+=1 end
>         if  x==2    then tab[0][1]+=1 end
>         if  x==1    then tab[0][2]+=1 end
>         if  x==0.5 then tab[0][3]+=1 end
>         if  x==0.2 then tab[0][4]+=1 end
>         if  x==0.1 then tab[0][5]+=1 end
>         end
> end
> 
> 
>     q=1
>     m=1
>     s=0
> p = Automat.new(15,15,20,25,25,25)
>  napoje = [
>    Napoj.new(1.7,0,"Coca-Cola"),
>    Napoj.new(2,0,"Sprite"),
>    Napoj.new(2.1,20,"Fanta") ]
> 
> 
> while q!=0
>       puts "Co chcesz zrobic?"
> puts "Kupic napoj: nacisnij 1"
> puts "Wydrukowac raport o monetach: nacisnij 2"
> puts "Wydrukowac raport o kupionych napojach: nacisnij 3"
> puts "Wyjsc: nacisnij 0"
> 
> q = gets
> puts q
> 
> case q
> 
> when 1
> 
>      for j in 0..2
>              napoje[j].nazwaa()
>              puts ": "+napoje[j].cenaa()+" nacisnij "+j
>                                     end
>      g = gets
>      if napoje[g].czyjest() then
>       y=1
>           s=0
>       while y!=0
>                 puts "Monety wrzucne: "+s+" Co chcesz zrobic: \n\t\t 
> Wrzuc monete: 0 \n\t\t Kup napoj: 1 \n\t\t Anuluj: 2"
>       puts "Twoj wybor: "
>       y = gets
>       if y==0 then
>         puts "Wrzuc monete. "
>                 m = gets
>                 s+=m
>                 p.dodaj(m)
>                       end
>       if y==1 && napoje[g].wydajreszte(s)<0 then  puts "Brak srodkow. 
> Wrzuc monete."
>         else
>         puts "reszta: "
>                 p.monety(napoje,s,g)
>                 end
>                 if y==2 then break end
>               end
> 
> 
>       else puts "Brak zadanego napoju."
>       end
> when 2
>   p.wypisz()
> when 3
>      puts "Kupiles: "
>      for i in 0..2
>     napoje[i].nazwaa()
>         puts ": ", napoje[i].kupno()
>         end
>         end
>         end
> -- 
> Posted via http://www.ruby-forum.com/.

Jed,

if you ask for a variable using 'gets', this gives you a String.
So you have to write

mystring=gets
case mystring
  when '1'  # instead of when 1
   #  ....
 
I would love to be able to speak Polish ... it's amazing that people who can still ask questions
about anything :)

Best regards,

Axel 

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