From: Josh Cheek <josh.cheek@...>
Date: 2009-08-29T06:34:43+09:00
Subject: Re: Error with an array of strings

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#Get numbers
total = [ ]

until $_  == "n"
  puts "Enter Number:\n"
  number = STDIN.gets
  number.chop!
  number.to_i  #this is returning a new int, not converting number to int
               #you would need to do number = number.to_i
               #of course, you can do to_f to get a Float

  total.push(number) #puts all the numbers into the array

  print "add more numbers to average? y or n\n"
  continue = STDIN.gets
  continue.chop!
end

#Compute Average

#multiply by 1.0 to make it a Float (integer division will truncate
remainders)
#inject just passes some value through each of the indexes
#in this case we are passing the sum, it's initial value is zero
#so we pass zero as the argument, then in the block, we take
#the sum and the number. whatever the block returns will be
#plugged in as the sum in the next iteration, and whatever the last
#iteration returns will be what the method returns. This is why we do
#sum+num.to_f instead of sum += num.to_f

averageall = 1.0 * total.inject(0){|sum,num| sum + num.to_f } / total.length


print "Average is: ", averageall,"\n" #you're getting puts and print
confused



__END__
#The below code might be a suitable replacement for your input
#though 7stud had a good point, calling that variable "total" is not wise.
#You could actually add the value to total, and keep another variable
#to track how many inputs there were. That would actually be more efficient
#and remove the need for the inject method.

total = []
loop do
  print "Enter Number: "
  total << gets.to_f                            #get the number as a float,
push it onto total
  print "Do you have more numbers to average? "
  break if gets =~ /^n/i                        #get the input, continue if
the first letter isn't n
end

p total #inspect the input

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