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Re: Using functions to return something

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This is what I did :

I created a file , defined a new variable c and saved it as ex50.rb ---

def add(a, b, c)   
    puts "(ADDING #{a} + #{b}) / #{c}"   
    return (a + b) / c 
end 

age = add(30, 10) / 5 

puts "Age: #{age}"

Then I tried to run it :

CaiGengYangs-MacBook-Pro:~ CaiGengYang$ ruby ex50.rb

But I got this error message :

ruby: No such file or directory -- ex50.rb (LoadError)





On Wednesday, April 20, 2016 at 1:19:26 AM UTC+8, Robert Klemme wrote:
> On 19.04.2016 16:06, Cai Gengyang wrote:
> > --- So I managed to write a simple function and use return and puts to display it.
> >
> > def add(a, b)
> >    puts "ADDING #{a} + #{b}"
> >    return a + b
> > end
> >
> > age = add(30, 5)
> >
> > puts "Age: #{age}"
> >
> > Display :
> >
> > CaiGengYangs-MacBook-Pro:GoatBoy CaiGengYang$ ruby ex80.rb
> > ADDING 30 + 5
> > Age: 35
> >
> > --- But when I tried to extend it to (A+B)/C, it display error message :
> >
> > def add(a, b)
> >    puts "(ADDING #{a} + #{b}) / #{c}"
> >    return (a + b) / c
> > end
> >
> > age = add(30, 10) / 5
> >
> > puts "Age: #{age}"
> >
> > Display :
> >
> > CaiGengYangs-MacBook-Pro:GoatBoy CaiGengYang$ ruby ex90.rb
> > ex90.rb:2:in `add': undefined local variable or method `c' for main:Object (NameError)
> > 	from ex90.rb:6:in `<main>''
> >
> > Any smart person over here ? Help lah ...
> 
> The error message really says it all.
> 
> 	robert
> 
> 
> -- 
> remember.guy do |as, often| as.you_can - without end
> http://blog.rubybestpractices.com/

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Thread

Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-19 07:06 -0700
  Re: Using functions to return something Robert Klemme <shortcutter@googlemail.com> - 2016-04-19 19:19 +0200
    Re: Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-19 22:28 -0700
      Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 09:25 +0200
        Re: Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-20 04:12 -0700
          Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 15:42 +0200
            Re: Using functions to return something Kaz Kylheku <545-066-4921@kylheku.com> - 2016-04-20 14:34 +0000
              Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 20:48 +0200
                Re: Using functions to return something Kaz Kylheku <545-066-4921@kylheku.com> - 2016-04-20 19:27 +0000
      Re: Using functions to return something jacki <collector@idealan.pl> - 2016-04-20 10:30 +0200

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