CODEWITHSUNDEEP
ruby-on-railsruby
user7736482
user7736482

Reputation:

Ruby and instantiate objects

I have a class named Fraction that calculates the harmonic sum. Basically, I want to be able to input a value, and then the program be able to calculate the harmonic sum up to that number. For example, if a user inputs 3 then I want the output to be "harmonic 1: 1/1, harmonic 2: 3/2, harmonic 3: 11/6". This is what I have for the method so far. 

print "Enter a value for your harmonic sum: "
x = gets.chomp.to_i

def harmonic_sum(x)
    (1..x).inject(Fraction.new(0)) do |a, i|
    harmonic = Fraction.new(1, i)
    puts "h#{i}: #{harmonic + a}"

    a + harmonic
    end
end

puts harmonic_sum

I keep getting an error that my argument is wrong. Any help would be appreciated!

Upvotes: 0

Views: 53

Answers (1)

max pleaner
max pleaner

Reputation: 26768

Right here you get an input:

x = gets.chomp.to_i

Then you define the method which requires one argument:

def harmonic_sum(x)

but here you call it with no arguments:

puts harmonic_sum

Instead, use puts harmonic_sum(x)

Upvotes: 1

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