Alex DeCaria wrote:
> Spencer Spence wrote:
>> class Calculater
>>   def dothis(x,y)
>>     puts x+y
>>   end
>> end
>> 
>> object = Calculater.new
>>   @@number = gets
>>   @@number2 = gets
>> object.doThis(number,number2)
>> 
>> i'm getting this error,
>> C:\Users\Spencer_2\Documents\NetBeansProjects\RubyApplication1\lib\new_main.rb:12:
>> undefined local variable or method `number' for main:Object (NameError)
>> 
>> I'm used to programming in java so I assumed that the doThis(x,y)
>> parameters are just temporary variables in ruby. Am I wrong?
> 
> The variable number is different than the variable @@number.  number is 
> a local variable, whereas @@number is a class variable.  So, number (and 
> number2) are undefined when you are calling the doThis method.
> 
> How about just doing number = gets and number2 = gets, without the @@.
> 
> -Alex

An additional thing to keep in mind.  gets returns the input as a 
string.  To make them numbers you should do number = gets.to_i (for 
integers) or gets.to_f (for floats).

--Alex
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