#!/usr/koeki/bin/ruby
waribiki = 0.8 # 見切り品の割引倍率(2割引)
def mikiri(price, waribiki) # mikiriメソッドの定義
newprice = price*waribiki # 割引倍率を掛けているつもり
printf("%d円のところ%d円!!\n", price, newprice.to_i)
end
print("元の値段: ")
x = gets.to_i
mikiri(x, waribiki)