From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-10-02T11:32:50+09:00
Subject: Fwd: instance variable/ I'm lost

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Begin forwarded message:

> From: Erik Boling <schmode93@yahoo.com>
> Date: October 1, 2007 9:21:08 PM CDT
> To: ruby-talk@ruby-lang.org (ruby-talk ML)
> Subject: instance variable/ I'm lost
> Reply-To: ruby-talk@ruby-lang.org
>
> Hello i am new to programming/ ruby but i have had some help from a
> cousin and read a book so i have some knowlage of what I'm doing.
> Anyways in my free time i was creating a program that tested me on  
> easy
> multiplication problems to keep my mind fresh;
>
> puts 'How many problems do you want to solve?'
> problems = gets.chomp
>
> 5.downto(1) do |x|
>   puts "The test will beging #{x} in seconds! "
>   sleep 1
> end
> puts 'Start!'
>
>   def multiply
> multiple2 = rand(11)
> multiple1 = rand(11S)
>   answer = multiple1 * multiple2
> puts 'what is ' + multiple1.to_s + ' * ' + multiple2.to_s + ' ?'
>   answerp = gets.chomp
>   if answer.to_s == answerp.to_s
>     puts "good job"
>   else puts "You fail!"
>   end
> end
>
> problems.to_i.times do multiply
> end
>
> :
> So i was wondering, how can i tally up how many times they answer
> correctly. I tried putting in the definition after the if statement
> correct + 1, * obviously i made the variable "correct" above* but the
> problem is, i cant retrive the variable out of the definition i had
> made. which brings me to my question of instance variables. Can't i  
> make
> a seperate def and create and instance variable like
> def correct
> @correct = correct
>
> then in my multiplication def. under the if statement do
> correct + 1
>
> then finally at the end do
> puts correct
>  and that would give me the total correct, but thats not working  
> for me?
> i dont know what im doing wrong? I see these instance variable in this
> confusing book i just started to read, and it looks like maybe there
> needs to be a class?!?!? idk but if someone could help me get this  
> stuff
> figured out that would be awesome!
> ps: sorry long post :(
> -- 
> Posted via http://www.ruby-forum.com/.
>
Instance variables start with @
so you want :
@correct   or   @number_correct

to increment it by one:
@correct += 1


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