#!/usr/koeki/bin/ruby
# -*- coding: utf-8 -*-

sum = 0

for subject in ["英語", "数学", "国語"]
  print subject + "は何点？ "
  sum += gets.chomp.to_i
end

open("output.txt", "w") do |f|
  f.printf("合計は%d点です\n", sum)
end