Cash Register II w/ Methods

cashregister2.rb

=begin
As a cashier
I want to enter the sale price of each item
So that the program will calculate the amount due
Developed by: Anthony Ross, Dan Clarke, and Greg Sheppard
=end
def sub_total(array)
  subtotal_amt = 0.0
  array.each do |x|
    subtotal_amt += x
  end
  subtotal_amt
end

def due(amount_tendered, subtotal)
  amount_tendered - subtotal
end

def currency_conv(float)
  "$%0.2f" % float
end

def list(array)
  array.each do |x|
    puts currency_conv(x)
  end
end

trans = []
item = ''

while true
  puts "What is the sale price?"
  item = gets.chomp
  if item == 'done'
    break
  end

  trans << item.to_f

  puts "\nSubtotal: #{currency_conv(sub_total(trans))} \n "
end

puts "\nHere are your item prices: \n "
list(trans)
puts "The total amount due is: #{currency_conv(sub_total(trans))}"

puts "\nWhat is the amount tendered?"
amount = gets.chomp.to_f
amount_due = due(amount, sub_total(trans))

if amount_due > 0
  puts "\n===Thank You!==="
  puts "The total change due is #{currency_conv(amount_due) } \n "
  puts Time.now.strftime("%m/%d/%Y %I:%M%p") # Format should be 02/12/2013 5:50PM
  puts "================"
else
  puts " \nWARNING: Customer still owes #{currency_conv(amount_due)}! Exiting..."
end