ペアプロ 送料問題 回答編

soryo.rb

#商品選択
def purchase(lists, total)
  puts "何を買いますか"
  num = 0
  lists.each do |list|
    puts "#{num}:#{list[:fruit]}"
    num += 1
  end

  select = gets.to_i
  list = lists[select]
  total[0] += list[:price]
  total[1] += list[:weight]
  puts "#{list[:fruit]}を購入しました"
  return total
end

#レジに進む
def register(total)
  total_weight = total[1]
  if total[0] >= 2500
    postage = 0
  elsif total_weight >= 2000
    postage = 500
  else
    postage = 200
  end

  total_price = total[0] + postage
  puts "品物代：#{total[0]}円"
  puts "送料：#{postage}円"
  puts "合計金額：#{total_price}円"

  done
end

def done
  puts "またのご利用をお待ちしています"
  exit
end

#商品リスト
lists = [{fruit: "cherry", price: 500, weight: 200}, {fruit: "apple", price: 200, weight: 500}, {fruit: "melon", price: 1000, weight: 1000}]

total = [0, 0]

line = "-------------------------------------------"
puts "いらっしゃいませ！"
puts line
puts "商品"

lists.each do |list|
  puts "#{list[:fruit]}：#{list[:price]}円：重量#{list[:weight]}g"
end

puts line
puts "＊＊＊品物代2500円以上で送料無料です！！＊＊＊"

while true do
  puts "何をしますか？\n番号を選択してください"
  puts "[0]商品を選択する"
  puts "[1]レジに進む"
  puts "[2]買い物をやめる"
  puts line
  num = gets.to_i
  if num == 0
    total = purchase(lists, total) #商品選択へ
  elsif num == 1
    register(total) #レジに進む
  else
    done() #終了
  end

end